Arquivo da tag: Incerteza

How the IPCC is sharpening its language on climate change (The Carbon Brief)

01 Sep 2014, 17:40

Simon Evans

Barometer | Shutterstock

The Intergovernmental Panel on Climate Change (IPCC) is sharpening the language of its latest draft synthesis report, seen by Carbon Brief.

Not only is the wording around how the climate is changing more decisive, the evidence the report references is stronger too, when compared to the  previous version published in 2007.

The synthesis report, due to be published on 2 November, will wrap up the IPCC’s fifth assessment (AR5) of climate change. It will summarise and draw together the information in IPCC reports on the science of climate change, its  impacts and the  ways it can be addressed.

We’ve compared a draft of the synthesis report with that published in 2007 to find out how they compare. Here are the key areas of change.

Irreversible impacts are being felt already

The AR5 draft synthesis begins with a decisive statement that human influence on the climate is “clear”, that recent emissions are the highest in history and that “widespread and consequential impacts” are already being felt.

This opening line shows how much has changed in the way the authors present their findings. In contrast, the 2007 report opened with a discussion of scientific progress and an extended paragraph on definitions.

There are also a couple of clear thematic changes in the 2014 draft. The first, repeated frequently throughout, is the idea that climate change impacts are already being felt.

For instance it says that the height of coastal floods has already increased and that climate-change-related risks from weather extremes such as heatwaves and heavy rain are “already moderate”.

These observations are crystallised in a long section on Article 2 of the UN’s climate change convention, which has been signed by every country of the world. Article 2 says that the objective of the convention is to avoid dangerous climate change.

The AR5 draft implies the world may already have failed in this task:

“Depending on value judgements and specific circumstances, currently observed impacts might already be considered dangerous for some communities.”

The second theme is a stronger emphasis on irreversible impacts compared to the 2007 version. The 2014 draft says:

“Continued emission of greenhouse gases will cause further warming and long-lasting changes in all components of the climate system, increasing the likelihood of severe, pervasive and irreversible impacts for people and ecosystems.”

It says that a large fraction of warming will be irreversible for hundreds to thousands of years and that the Greenland ice sheet will be lost when warming reaches between one and four degrees above pre-industrial temperatures. Current warming since pre-industrial times is about 0.8 degrees celsius.

In effect the report has switched tense from future conditional (“could experience”) to present continuous (“are experiencing”).  For instance it says there are signs that some corals and Arctic ecosystems “are already experiencing irreversible regime shifts” because of warming.

Stronger evidence than before

As well as these thematic changes in the use of language, the AR5 synthesis comes to stronger conclusions in many other areas.

This is largely because the scientific evidence has solidified in the intervening seven years, the IPCC says.

We’ve drawn together a collection of side-by-side statements so you can see for yourself how the conclusions have changed. Some of the shifts in language are subtle – but they are significant all the same.

IPCC Table With Logo

Source: IPCC AR4 Synthesis Report, draft AR5 Synthesis Report

Climate alarmism or climate realism?

The authors of the latest synthesis report seem to have made an effort to boost the impact of their words. They’ve used clearer and more direct language along with what appears to be a stronger emphasis on the negative consequences of inaction.

The language around relying on adaptation to climate change has also shifted. It now more clearly emphasises the need for mitigation to cut emissions, if the worst impacts of warming are to be avoided.

Some are bound to read this as an unwelcome excursion into advocacy. But others will insist it is simply a case of better presenting the evidence that was already there, along with advances in scientific knowledge.

Government representatives have the chance to go over the draft AR5 synthesis report with a fine toothcomb when they meet during 27-31 October.

Will certain countries try to tone down the wording, as they have been accused of doing in the past? Or will the new, more incisive language make the final cut?

To find out, tune in on 2 November when the final synthesis report will be published.

Southwest U.S. may face ‘megadrought’ this century (Science Daily)

Date: August 27, 2014

Source: Cornell University

Summary: Because of global warming, scientists say, the chances of the southwestern United States experiencing a decade long drought is at least 50 percent, and the chances of a “megadrought” — one that lasts over 30 years — ranges from 20 to 50 percent over the next century. 

Risk of megadrought in Southwestern U.S. Credit: Toby Ault, Cornell University; From “Assessing the risk of persistent drought using climate model simulations and paleoclimate data”

Because of global warming, scientists say, the chances of the southwestern United States experiencing a decade long drought is at least 50 percent, and the chances of a “megadrought” — one that lasts over 30 years — ranges from 20 to 50 percent over the next century.

The study by Cornell University, University of Arizona and U.S. Geological Survey researchers will be published in a forthcoming issue of the American Meteorological Society’s Journal of Climate.

“For the southwestern U.S., I’m not optimistic about avoiding real megadroughts,” said Toby Ault, Cornell assistant professor of earth and atmospheric sciences and lead author of the paper. “As we add greenhouse gases into the atmosphere — and we haven’t put the brakes on stopping this — we are weighting the dice for megadrought conditions.”

As of mid-August, most of California sits in a D4 “exceptional drought,” which is in the most severe category. Oregon, Arizona, New Mexico, Oklahoma and Texas also loiter between moderate and exceptional drought. Ault says climatologists don’t know whether the severe western and southwestern drought will continue, but he said, “With ongoing climate change, this is a glimpse of things to come. It’s a preview of our future.”

Ault said that the West and Southwest must look for mitigation strategies to cope with looming long-drought scenarios. “This will be worse than anything seen during the last 2,000 years and would pose unprecedented challenges to water resources in the region,” he said.

In computer models, while California, Arizona and New Mexico will likely face drought, the researchers show the chances for drought in parts of Washington, Montana and Idaho may decrease.

Beyond the United States, southern Africa, Australia and the Amazon basin are also vulnerable to the possibility of a megadrought. With increases in temperatures, drought severity will likely worsen, “implying that our results should be viewed as conservative,” the study reports.

“These results help us take the long view of future drought risk in the Southwest — and the picture is not pretty. We hope this opens up new discussions about how to best use and conserve the precious water that we have,” said Julia Cole, UA professor of geosciences and of atmospheric sciences.

The study, “Assessing the Risk of Persistent Drought Using Climate Model Simulations and Paleoclimate Data,” was also co-authored by Julia E. Cole, David M. Meko and Jonathan T. Overpeck of University of Arizona; and Gregory T. Pederson of the U.S. Geological Survey.

The National Science Foundation, National Center for Atmospheric Research, the U.S. Geological Survey and the National Oceanic and Atmospheric Administration funded the research.


Journal Reference:

  1. Toby R. Ault, Julia E. Cole, Jonathan T. Overpeck, Gregory T. Pederson, David M. Meko. Assessing the risk of persistent drought using climate model simulations and paleoclimate data. Journal of Climate, 2014; 140122102410007 DOI: 10.1175/JCLI-D-12-00282.1

How to Talk About Climate Change So People Will Listen (The Atlantic)

SEPTEMBER 2014

Environmentalists warn us that apocalypse awaits. Economists tell us that minimal fixes will get us through. Here’s how we can move beyond the impasse. 

Josh Cochran

Not long ago, my newspaper informed me that glaciers in the western Antarctic, undermined by the warmer seas of a hotter world, were collapsing, and their disappearance “now appears to be unstoppable.” The melting of these great ice sheets would make seas rise by at least four feet—ultimately, possibly 12—more than enough to flood cities from New York to Tokyo to Mumbai. Because I am interested in science, I read the two journal articles that had inspired the story. How much time do we have, I wondered, before catastrophe hits?

One study, in Geophysical Research Letters, provided no guidance; the authors concluded only that the disappearing glaciers would “significantly contribute to sea level rise in decades to centuries to come.” But the other, in Science, offered more-precise estimates: during the next century, the oceans will surge by as much as a quarter of a millimeter a year. By 2100, that is, the calamity in Antarctica will have driven up sea levels by almost an inch. The process would get a bit faster, the researchers emphasized, “within centuries.”

How is one supposed to respond to this kind of news? On the one hand, the transformation of the Antarctic seems like an unfathomable disaster. On the other hand, the disaster will never affect me or anyone I know; nor, very probably, will it trouble my grandchildren. How much consideration do I owe the people it will affect, my 40-times-great-grandchildren, who, many climate researchers believe, will still be confronted by rising temperatures and seas? Americans don’t even save for their own retirement! How can we worry about such distant, hypothetical beings?

In our ergonomic chairs and acoustical-panel cubicles, we sit cozy as kings atop 300 years of flaming carbon.

Worse, confronting climate change requires swearing off something that has been an extraordinary boon to humankind: cheap energy from fossil fuels. In the 3,600 years between 1800B.C. and 1800 A.D., the economic historian Gregory Clark has calculated, there was “no sign of any improvement in material conditions” in Europe and Asia. Then came the Industrial Revolution. Driven by the explosive energy of coal, oil, and natural gas, it inaugurated an unprecedented three-century wave of prosperity. Artificial lighting, air-conditioning, and automobiles, all powered by fossil fuels, swaddle us in our giddy modernity. In our ergonomic chairs and acoustical-panel cubicles, we sit cozy as kings atop 300 years of flaming carbon.

In the best of times, this problem—given its apocalyptic stakes, bewildering scale, and vast potential cost—would be difficult to resolve. But we are not in the best of times. We are in a time of legislative paralysis. In an important step, the Obama administration announced in June its decision to cut power-plant emissions 30 percent by 2030. Otherwise, this country has seen strikingly little political action on climate change, despite three decades of increasingly high-pitched chatter by scientists, activists, economists, pundits, and legislators.

The chatter itself, I would argue, has done its share to stall progress. Rhetorical overreach, moral miscalculation, shouting at cross-purposes: this toxic blend is particularly evident when activists, who want to scare Americans into taking action, come up against economists, with their cool calculations of acceptable costs. Eco-advocates insist that only the radical transformation of society—the old order demolished, foundation to roof—can fend off the worst consequences of climate change. Economists argue for adapting to the most-likely consequences; cheerleaders for industrial capitalism, they propose quite different, much milder policies, and are ready to let nature take a bigger hit in the short and long terms alike. Both envelop themselves in the mantle of Science, emitting a fug of charts and graphs. (Actually, every side in the debate, including the minority who deny that humans can affect the climate at all, claims the backing of Science.) Bewildered and battered by the back-and-forth, the citizenry sits, for the most part, on its hands. For all the hot air expended on the subject, we still don’t know how to talk about climate change.

As an issue, climate change was unlucky: when nonspecialists first became aware of it, in the 1990s, environmental attitudes had already become tribal political markers. As the Yale historian Paul Sabin makes clear in The Bet, it wasn’t always this way. The votes for the 1970 Clean Air Act, for example, were 374–1 in the House, 73–0 in the Senate. Sabin’s book takes off from a single event: a bet between the ecologist Paul R. Ehrlich and the economist Julian Simon a decade later. Ehrlich’s The Population Bomb (1968), which decried humankind’s rising numbers, was a foundational text in the environmental movement. Simon’s Ultimate Resource (1981) was its antimatter equivalent: a celebration of population growth, it awakened opposition to the same movement.

Activist led by Bill McKibben, the founder of 350.org, protest the building of the Keystone XL pipeline at the White House, February 2013. (AP)

Ehrlich was moderately liberal in his politics but unrestrained in his rhetoric. The second sentence of The Population Bomb promised that “hundreds of millions of people” would starve to death within two decades, no matter what “crash programs” the world launched to feed them. A year later, Ehrlich gave even odds that “England will not exist in the year 2000.” In 1974, he told Congress that “a billion or more people” could starve in the 1980s “at the latest.” When the predictions didn’t pan out, he attacked his critics as “incompetent” and “ignorant,” “morons” and “idiots.”

Simon, who died in 1998, argued that “human resourcefulness and enterprise” will extricate us from our ecological dilemma. Moderately conservative in his politics, he was exuberantly uninhibited in his scorn for eco-alarmists. Humankind faces no serious environmental problems, he asserted. “All long-run trends point in exactly the opposite direction from the projections of the doomsayers.” (All? Really?) “There is no convincing economic reason why these trends toward a better life should not continue indefinitely.” Relishing his role as a spoiler, he gave speeches while wearing red plastic devil horns. Unsurprisingly, he attracted disagreement, to which he responded with as much bluster as Ehrlich. Critics, motivated by “blatant intellectual dishonesty” and indifference to the poor, were “corrupt,” their ideas “ignorant and wrongheaded.”

In 1980, the two men wagered $1,000 on the prices of five metals 10 years hence. If the prices rose, as Ehrlich predicted, it would imply that these resources were growing scarcer, as Homo sapiens plundered the planet. If the prices fell, this would be a sign that markets and human cleverness had made the metals relatively less scarce: progress was continuing. Prices dropped. Ehrlich paid up, insisting disingenuously that he had been “schnookered.”

Schnookered, no; unlucky, yes. In 2010, three Holy Cross economists simulated the bet for every decade from 1900 to 2007. Ehrlich would have won 61 percent of the time. The results, Sabin says, do not prove that these resources have grown scarcer. Rather, metal prices crashed after the First World War and spent most of a century struggling back to their 1918 levels. Ecological issues were almost irrelevant.

The bet demonstrated little about the environment but much about environmental politics. The American landscape first became a source of widespread anxiety at the beginning of the 20th century. Initially, the fretting came from conservatives, both the rural hunters who established the licensing system that brought back white-tailed deer from near-extinction and the Ivy League patricians who created the national parks. So ineradicable was the conservative taint that decades later, the left still scoffed at ecological issues as right-wing distractions. At the University of Michigan, the radical Students for a Democratic Society protested the first Earth Day, in 1970, as elitist flimflam meant to divert public attention from class struggle and the Vietnam War; the left-wing journalist I. F. Stone called the nationwide marches a “snow job.” By the 1980s, businesses had realized that environmental issues had a price tag. Increasingly, they balked. Reflexively, the anticorporate left pivoted; Earth Day, erstwhile snow job, became an opportunity to denounce capitalist greed.

Climate change is a perfect issue for symbolic battle, because it is as yet mostly invisible.

The result, as the Emory historian Patrick Allitt demonstrates in A Climate of Crisis, was a political back-and-forth that became ever less productive. Time and again, Allitt writes, activists and corporate executives railed against each other. Out of this clash emerged regulatory syntheses: rules for air, water, toxins. Often enough, businesspeople then discovered that following the new rules was less expensive than they had claimed it would be; environmentalists meanwhile found out that the problems were less dire than they had claimed.

 

Throughout the 1980s, for instance, activists charged that acid rain from midwestern power-plant emissions was destroying thousands of East Coast lakes. Utilities insisted that anti-pollution equipment would be hugely expensive and make homeowners’ electric bills balloon. One American Electric Power representative predicted that acid-rain control could lead to the “destruction of the Midwest economy.” A 1990 amendment to the Clean Air Act, backed by both the Republican administration and the Democratic Congress, set up a cap-and-trade mechanism that reduced acid rain at a fraction of the predicted cost; electric bills were barely affected. Today, most scientists have concluded that the effects of acid rain were overstated to begin with—fewer lakes were hurt than had been thought, and acid rain was not the only cause.

Rather than learning from this and other examples that, as Allitt puts it, “America’s environmental problems, though very real, were manageable,” each side stored up bitterness, like batteries taking on charge. The process that had led, however disagreeably, to successful environmental action in the 1970s and ’80s brought on political stasis in the ’90s. Environmental issues became ways for politicians to signal their clan identity to supporters. As symbols, the issues couldn’t be compromised. Standing up for your side telegraphed your commitment to take back America—either from tyrannical liberal elitism or right-wing greed and fecklessness. Nothing got done.

As an issue, climate change is perfect for symbolic battle, because it is as yet mostly invisible. Carbon dioxide, its main cause, is not emitted in billowing black clouds, like other pollutants; nor is it caustic, smelly, or poisonous. A side effect of modernity, it has for now a tiny practical impact on most people’s lives. To be sure, I remember winters as being colder in my childhood, but I also remember my home then as a vast castle and my parents as godlike beings.

In concrete terms, Americans encounter climate change mainly in the form of three graphs, staples of environmental articles. The first shows that atmospheric carbon dioxide has been steadily increasing. Almost nobody disputes this. The second graph shows rising global temperatures. This measurement is trickier: carbon dioxide is spread uniformly in the air, but temperatures are affected by a host of factors (clouds, rain, wind, altitude, the reflectivity of the ground) that differ greatly from place to place. Here the data are more subject to disagreement. A few critics argue that for the past 17 years warming has mostly stopped. Still, most scientists believe that in the past century the Earth’s average temperature has gone up by about 1.5 degrees Fahrenheit.

Rising temperatures per se are not the primary concern. What matters most is their future influence on other things: agricultural productivity, sea levels, storm frequency, infectious disease. As the philosopher Dale Jamieson points out in the unfortunately titled Reason in a Dark Time, most of these effects cannot be determined by traditional scientific experiments—white-coats in laboratories can’t melt a spare Arctic ice cap to see what happens. (Climate change has no lab rats.) Instead, thousands of researchers refine ever bigger and more complex mathematical models. The third graph typically shows the consequences such models predict, ranging from worrisome (mainly) to catastrophic (possibly).

Such charts are meaningful to the climatologists who make them. But for the typical citizen they are a muddle, too abstract—too much like 10th-grade homework—to be convincing, let alone to motivate action. In the history of our species, has any human heart ever been profoundly stirred by a graph? Some other approach, proselytizers have recognized, is needed.

To stoke concern, eco-campaigners like Bill McKibben still resort, Ehrlich-style, to waving a skeleton at the reader. Thus the first sentence of McKibben’sOil and Honey, a memoir of his climate activism, describes 2011–12, the period covered by his book, as “a time when the planet began to come apart.” Already visible “in almost every corner of the earth,” climate “chaos” is inducing “an endless chain of disasters that will turn civilization into a never-ending emergency response drill.”

Bill McKibben says we must “start producing a nation of careful, small-scale farmers … who can adapt to the crazed new world with care and grace.”

The only solution to our ecological woes, McKibben argues, is to live simpler, more local, less resource-intensive existences—something he believes is already occurring. “After a long era of getting big and distant,” he writes, “our economy, and maybe our culture, has started to make a halting turn toward the small and local.” Not only will this shift let us avoid the worst consequences of climate change, it will have the happy side effect of turning a lot of unpleasant multinational corporations to ash. As we “subside into a workable, even beautiful, civilization,” we will lead better lives. No longer hypnotized by the buzz and pop of consumer culture, narcotized couch potatoes will be transformed into robust, active citizens: spiritually engaged, connected to communities, appreciative of Earth’s abundance.

For McKibben, the engagement is full throttle: The Oil half of his memoir is about founding 350.org, a group that seeks to create a mass movement against climate change. (The 350 refers to the theoretical maximum safe level, in parts per million, of atmospheric carbon dioxide, a level we have already surpassed.) The Honey half is about buying 70 acres near his Vermont home to support an off-the-grid beekeeper named Kirk Webster, who is living out McKibben’s organic dream in a handcrafted, solar-powered cabin in the woods. Webster, McKibben believes, is the future. We must, he says, “start producing a nation of careful, small-scale farmers such as Kirk Webster, who can adapt to the crazed new world with care and grace, and who don’t do much more damage in the process.”

Poppycock, the French philosopher Pascal Bruckner in effect replies in The Fanaticism of the Apocalypse. A best-selling, telegenic public intellectual (a species that hardly exists in this country), Bruckner is mainly going after what he calls “ecologism,” of which McKibbenites are exemplars. At base, he says, ecologism seeks not to save nature but to purify humankind through self-flagellating asceticism.

To Bruckner, ecologism is both ethnocentric and counterproductive. Ethnocentric because eco-denunciations of capitalism simply give new, green garb to the long-standing Euro-American fear of losing dominance over the developing world (whose recent growth derives, irksomely, from fossil fuels). Counterproductive because ecologism induces indifference, or even hostility to environmental issues. In the quest to force humanity into a puritanical straitjacket of rural simplicity, ecologism employs what should be neutral, fact-based descriptions of a real-world problem (too much carbon dioxide raises temperatures) as bludgeons to compel people to accept modes of existence they would otherwise reject. Intuiting moral blackmail underlying the apparently objective charts and graphs, Bruckner argues, people react with suspicion, skepticism, and sighing apathy—the opposite of the reaction McKibbenites hope to evoke.

The ranchers and farmers in Tony Horwitz’s Boom, a deft and sometimes sobering e-book, suggest Bruckner may be on to something. Horwitz, possibly best known for his study of Civil War reenactors, Confederates in the Attic, travels along the proposed path of the Keystone XL, a controversial pipeline intended to take oil from Alberta’s tar-sands complex to refineries in Steele City, Nebraska—and the project McKibben has used as the rallying cry for 350.org. McKibben set off on his anti-Keystone crusade after the climatologist-provocateur James Hansen charged in 2011 that building the pipeline would be “game over” for the climate. If Keystone were built, Hansen later wrote, “civilization would be at risk.” Everyone Horwitz meets has heard this scenario. But nobody seems to have much appetite for giving up the perks of industrial civilization, Kirk Webster–style. “You want to go back to the Stone Age and use only wind, sun, and water?” one person asks. A truck driver in the tar-sands project tells Horwitz, “This industry is giving me a future, even if it’s a short one and we’re all about to toast together.” Given the scale of the forces involved, individual action seems futile. “It’s going to burn up anyhow at the end,” explains a Hutterite farmer, matter-of-factly. “The world will end in fire.”

 

Whereas McKibbenites see carbon dioxide as an emblem of a toxic way of life, economists like William Nordhaus of Yale tend to view it as simply a by-product of the good fortune brought by capitalism. Nordhaus, the president of the American Economic Association, has researched climate issues for four decades. His The Climate Casino has an even, unhurried tone; a classic Voice of Authority rumbles from the page. Our carbon-dioxide issues, he says, have a “simple answer,” one “firmly based in economic theory and history”:

The best approach is to use market mechanisms. And the single most important market mechanism that is missing today is a high price on CO2 emissions, or what is called “carbon prices” … The easiest way is simply to tax CO2 emissions: a “carbon tax” … The carbon price [from the tax] will be passed on to the consumer in the form of higher prices.

Nordhaus provides graphs (!) showing how a gradually increasing tax—or, possibly, a market in emissions permits—would slowly and steadily ratchet down global carbon-dioxide output. The problem, as he admits, is that the projected reduction “assumes full participation.” Translated from econo-speak, “full participation” means that the Earth’s rich and populous nations must simultaneously apply the tax. Brazil, China, France, India, Russia, the United States—all must move in concert, globally cooperating.

To say that a global carbon tax is a simple answer is like arguing that the simple answer to death is repealing the Second Law of Thermodynamics.

Alas, nothing like Nordhaus’s planetary carbon tax has ever been enacted. The sole precedent is the Montreal Protocol, the 1987 treaty banning substances that react with atmospheric ozone and reduce its ability to absorb the sun’s harmful ultraviolet radiation. Signed by every United Nations member and successfully updated 10 times, the protocol is a model of international eco-cooperation. But it involves outlawing chemicals in refrigerators and spray cans, not asking nations to revamp the base of their own prosperity. Nordhaus’s declaration that a global carbon tax is a simple answer is like arguing that the simple answer to death is repealing the Second Law of Thermodynamics.

Does climate change, as Nordhaus claims, truly slip into the silk glove of standard economic thought? The dispute is at the center of Jamieson’s Reason in a Dark Time. Parsing logic with the care of a raccoon washing a shiny stone, Jamieson maintains that economists’ discussions of climate change are almost as problematic as those of environmentalists and politicians, though for different reasons.

Remember how I was complaining that all discussions of climate change devolve into homework? Here, sadly, is proof. To critique economists’ claims, Jamieson must drag the reader through the mucky assumptions underlying cost-benefit analysis, a standard economic tool. In the case of climate change, the costs of cutting carbon dioxide are high. What are the benefits? If the level of carbon dioxide in the atmosphere rises only slightly above its current 400 parts per million, most climatologists believe, there is (roughly) a 90 percent chance that global temperatures will eventually rise between 3 and 8 degrees Fahrenheit, with the most likely jump being between 4 and 5 degrees. Nordhaus and most other economists conclude that humankind can slowly constrain this relatively modest rise in carbon without taking extraordinary, society-transforming measures, though neither decreasing the use of fossil fuels nor offsetting their emissions will be cheap or easy. But the same estimates show (again in rough terms) a 5 percent chance that letting carbon dioxide rise much above its current level would set off a domino-style reaction leading to global devastation. (No one pays much attention to the remaining 5 percent chance that the carbon rise would have very little effect on temperature.)

In our daily lives, we typically focus on the most likely result: I decide whether to jaywalk without considering the chance that I will trip in the street and get run over. But sometimes we focus on the extreme: I lock up my gun and hide the bullets in a separate place to minimize the chance that my kids will find and play with them. For climate change, should we focus on adapting to the mostprobable outcome or averting the most dangerous one? Cost-benefit analyses typically ignore the most-radical outcomes: they assume that society has agreed to accept the small but real risk of catastrophe—something environmentalists, to take one particularly vehement section of society, have by no means done.

On top of this, Jamieson argues, there is a second problem in the models economists use to discus climate change. Because the payoff from carbon-dioxide reduction will occur many decades from now, Nordhausian analysis suggests that we should do the bare minimum today, even if that means saddling our descendants with a warmer world. Doing the minimum is expensive enough already, economists say. Because people tomorrow will be richer than we are, as we are richer than our grandparents were, they will be better able to pay to clean up our emissions. Unfortunately, this is an ethically problematic stance. How can we weigh the interests of someone born in 2050 against those of someone born in 1950? In this kind of trade-off between generations, Jamieson argues, “there is no plausible value” for how much we owe the future.

Given their moral problems, he concludes, economic models are much less useful as guides than their proponents believe. For all their ostensible practicality—for all their attempts to skirt the paralysis-inducing specter of the apocalypse—economists, too, don’t have a good way to talk about climate change.

Years ago, a colleague and I spoke with the physicist Richard Feynman, later a national symbol of puckish wit and brash truth-telling. At the frontiers of science, he told us, hosts of unclear, mutually contradictory ideas are always swarming about. Researchers can never agree on how to proceed or even on what is important. In these circumstances, Feynman said, he always tried to figure out what would take him forward no matter which theory eventually turned out to be correct. In this agnostic spirit, let’s assume that rising carbon-dioxide levels will become a problem of some magnitude at some time and that we will want to do something practical about it. Is there something we should do, no matter what technical arcanae underlie the cost-benefit analyses, no matter when we guess the bad effects from climate change will kick in, no matter how we value future generations, no matter what we think of global capitalism? Indeed, is there some course of action that makes sense even if we think that climate change isn’t much of a problem at all?

As my high-school math teacher used to say, let’s do the numbers. Roughly three-quarters of the world’s carbon-dioxide emissions come from burning fossil fuels, and roughly three-quarters of that comes from just two sources: coal in its various forms, and oil in its various forms, including gasoline. Different studies produce slightly different estimates, but they all agree that coal is responsible for more carbon dioxide than oil is—about 25 percent more. That number is likely to increase, because coal consumption is growing much faster than oil consumption.

Geo-engineering involves tinkering with planetary systems we only partially understand. But planet-hacking does have an overarching advantage: it’s cheap.​

Although coal and oil are both fossil fuels, they are used differently. In this country, for example, the great majority of oil—about three-quarters—is consumed by individuals, as they heat their homes and drive their cars. Almost all U.S. coal (93 percent) is burned not in homes but by electric-power plants; the rest is mainly used by industry, notably for making cement and steel. Cutting oil use, in other words, requires huge numbers of people to change their houses and automobiles—the United States alone has 254 million vehicles on the road. Reducing U.S. coal emissions, by contrast, means regulating 557 big power plants and 227 steel and cement factories. (Surprisingly, many smaller coal plants exist, some at hospitals and schools, but their contributions are negligible.) I’ve been whacking poor old Nordhaus for his ideas about who should pay for climate change, but he does make this point, and precisely: “The most cost-effective way to reduce CO2 emissions is to reduce the use of coal first and most sharply.” Note, too, that this policy comes with a public-health bonus: reining in coal pollution could ultimately avoid as many as 6,600 premature deaths and 150,000 children’s asthma attacks per year in the United States alone.

 

Different nations have different arrangements, but almost everywhere the basic point holds true: a relatively small number of industrial coal plants—perhaps 7,000 worldwide—put out an amazingly large amount of carbon dioxide, more than 40 percent of the global total. And that figure is rising; last year, coal’s share of energy production hit a 44-year high, because Asian nations are building coal plants at a fantastic rate (and, possibly, because demand for coal-fired electricity will soar as electric cars become popular). No matter what your views about the impact and import of climate change, you are primarily talking about coal. To my mind, at least, retrofitting 7,000 industrial facilities, however mind-boggling, is less mind-boggling than, say, transforming the United States into “a nation of careful, small-scale farmers” or enacting a global carbon tax with “full participation.” It is, at least, imaginable.

The focus of the Obama administration on reducing coal emissions suggests that it has followed this logic. If the pattern of the late 20th century still held, industry would reply with exaggerated estimates of the cost, and compromises would be worked out. But because the environment has become a proxy for a tribal battle, an exercise in power politics will surely ensue. I’ve given McKibben grief for his apocalyptic rhetoric, but he’s exactly correct that without a push from a popular movement—without something like 350.org—meaningful attempts to cut back coal emissions are much less likely to yield results.

Regrettably, 350.org has fixated on the Keystone pipeline, which the Congressional Research Service has calculated would raise this nation’s annual output of greenhouse gases by 0.05 to 0.3 percent. (James Hansen, in arguing that the pipeline would be “game over” for the climate, erroneously assumed that all of the tar-sands oil could be burned rapidly, instead of dribbling out in relatively small portions year by year, over decades.) None of this is to say that exploiting tar sands is a good idea, especially given the apparent violation of native treaties in Canada. But a popular movement focused on symbolic goals will have little ability to win practical battles in Washington.

If politics fail, the only recourse, says David Keith, a Harvard professor of public policy and applied physics, will be a technical fix. And soon—by mid-century. Keith is talking about geo-engineering: fighting climate change with more climate change. A Case for Climate Engineering is a short book arguing that we should study spraying the stratosphere with tiny glittering droplets of sulfuric acid that bounce sunlight back into space, reducing the Earth’s temperature. Physically speaking, the notion is feasible. The 1991 eruption of Mount Pinatubo, in the Philippines, created huge amounts of airborne sulfuric acid—and lowered the Earth’s average temperature that year by about 1 degree.

Keith is candid about the drawbacks. Not only does geo-engineering involve tinkering with planetary systems we only partially understand, it can’t cancel out, even in theory, greenhouse problems like altered rainfall patterns and increased ocean acidity. The sulfur would soon fall to the Earth, a toxic rain of pollution that could kill thousands of people every year. The carbon dioxide that was already in the air would remain. To continue to slow warming, sulfur would have to be lofted anew every year. Still, Keith points out, without this relatively crude repair, unimpeded climate change could be yet more deadly.

Planet-hacking does have an overarching advantage: it’s cheap. “The cost of geoengineering the entire planet for a decade,” Keith writes, “could be less than the $6 billion the Italian government is spending on dikes and movable barriers to protect a single city, Venice, from climate change–related sea level rise.”

That advantage is also dangerous, he points out. A single country could geo-engineer the whole planet by itself. Or one country’s geo-engineering could set off conflicts with another country—a Chinese program to increase its monsoon might reduce India’s monsoon. “Both are nuclear weapons states,” Keith reminds us. According to Forbes, the world has 1,645 billionaires, several hundred of them in nations threatened by climate change. If their businesses or homes were at risk, any one of them could single-handedly pay for a course of geo-engineering. Is anyone certain none of these people would pull the trigger?

Few experts think that relying on geo-engineering would be a good idea. But no one knows how soon reality will trump ideology, and so we may finally have hit on a useful form of alarmism. One of the virtues of Keith’s succinct, scary book is to convince the reader that unless we find a way to talk about climate change, planes full of sulfuric acid will soon be on the runway.

How to choose? (Aeon)

When your reasons are worse than useless, sometimes the most rational choice is a random stab in the dark

by Michael Schulson

Illustration by Tim McDonaghIllustration by Tim McDonagh

Michael Schulson is an American freelance writer. His work has appeared in Religion Dispatches, The Daily Beast, and Religion and Politics, among others. He lives in Durham, North Carolina.

We could start with birds, or we could start with Greeks. Each option has advantages.

Let’s flip a coin. Heads and it’s the Greeks, tails and it’s the birds.

Tails.

In the 1970s, a young American anthropologist named Michael Dove set out for Indonesia, intending to solve an ethnographic mystery. Then a graduate student at Stanford, Dove had been reading about the Kantu’, a group of subsistence farmers who live in the tropical forests of Borneo. The Kantu’ practise the kind of shifting agriculture known to anthropologists as swidden farming, and to everyone else as slash-and-burn. Swidden farmers usually grow crops in nutrient-poor soil. They use fire to clear their fields, which they abandon at the end of each growing season.

Like other swidden farmers, the Kantu’ would establish new farming sites ever year in which to grow rice and other crops. Unlike most other swidden farmers, the Kantu’ choose where to place these fields through a ritualised form of birdwatching. They believe that certain species of bird – the Scarlet-rumped Trogon, the Rufous Piculet, and five others – are the sons-in-law of God. The appearances of these birds guide the affairs of human beings. So, in order to select a site for cultivation, a Kantu’ farmer would walk through the forest until he spotted the right combination of omen birds. And there he would clear a field and plant his crops.

Dove figured that the birds must be serving as some kind of ecological indicator. Perhaps they gravitated toward good soil, or smaller trees, or some other useful characteristic of a swidden site. After all, the Kantu’ had been using bird augury for generations, and they hadn’t starved yet. The birds, Dove assumed, had to be telling the Kantu’something about the land. But neither he, nor any other anthropologist, had any notion of what that something was.

He followed Kantu’ augurers. He watched omen birds. He measured the size of each household’s harvest. And he became more and more confused. Kantu’ augury is so intricate, so dependent on slight alterations and is-the-bird-to-my-left-or-my-right contingencies that Dove soon found there was no discernible correlation at all between Piculets and Trogons and the success of a Kantu’ crop. The augurers he was shadowing, Dove told me, ‘looked more and more like people who were rolling dice’.

Stumped, he switched dissertation topics. But the augury nagged him. He kept thinking about it for ‘a decade or two’. And then one day he realised that he had been looking at the question the wrong way all the time. Dove had been asking whether Kantu’ augury imparted useful ecological information, as opposed to being random. But what if augury was useful precisely because it was random?

For the Kantu’, the best option was one familiar to any investor when faced with an unpredictable market: they needed to diversify

Tropical swidden agriculture is a fundamentally unpredictable enterprise. The success of a Kantu’ swidden depends on rainfall, pest outbreaks and river levels, among other factors. A patch of forest that might yield a good harvest in a rainy year could be unproductive in a drier year, or in a year when a certain pest spreads. And things such as pest outbreaks or the weather are pretty much impossible to predict weeks or months in the future, both for humans and for birds.

In the face of such uncertainty, though, the human tendency is to seek some kind of order – to come up with a systematic method for choosing a field site, and, in particular, to make decisions based on the conditions of the previous year.

Neither option is useful. Last year’s conditions have pretty much no bearing on events in the years ahead (a rainy July 2013 does not have any bearing on the wetness of July 2014). And systematic methods can be prey to all sorts of biases. If, for example, a Kantu’ farmer predicted that the water levels would be favourable one year, and so put all his fields next to the river, a single flood could wipe out his entire crop. For the Kantu’, the best option was one familiar to any investor when faced with an unpredictable market: they needed to diversify. And bird augury was an especially effective way to bring about that kind of diversification.

It makes sense that it should have taken Dove some 15 years to realise that randomness could be an asset. As moderns, we take it for granted that the best decisions stem from a process of empirical analysis and informed choice, with a clear goal in mind. That kind of decision-making, at least in theory, undergirds the ways that we choose political leaders, play the stock market, and select candidates for schools and jobs. It also shapes the way in which we critique the rituals and superstitions of others. But, as the Kantu’ illustrate, there are plenty of situations when random chance really is your best option. And those situations might be far more prevalent in our modern lives than we generally admit.

Over the millennia, cultures have expended a great deal of time, energy and ingenuity in order to introduce some element of chance into decision-making. Naskapi hunters in the Canadian province of Labrador would roast the scapula of a caribou in order to determine the direction of their next hunt, reading the cracks that formed on the surface of the bone like a map. In China, people have long sought guidance in the passages of the I Ching, using the intricate manipulation of 49 yarrow stalks to determine which section of the book they ought to consult. The Azande of central Africa, when faced with a difficult choice, would force a powdery poison down a chicken’s throat, finding the answer to their question in whether or not the chicken survived – a hard-to-predict, if not quite random, outcome. (‘I found this as satisfactory a way of running my home and affairs as any other I know of,’ wrote the British anthropologist E E Evans-Pritchard, who adopted some local customs during his time with the Azande in the 1920s).

The list goes on. It could – it does – fill books. As any blackjack dealer or tarot reader might tell you, we have a love for the flip of the card. Why shouldn’t we? Chance has some special properties. It is a swift, consistent, and (unless your chickens all die) relatively cheap decider. Devoid of any guiding mind, it is subject to neither blame nor regret. Inhuman, it can act as a blank surface on which to descry the churning of fate or the work of divine hands. Chance distributes resources and judges disputes with perfect equanimity.

The sanitising effect of augury cleans out any bad reasons

Above all, chance makes its selection without any recourse to reasons. This quality is perhaps its greatest advantage, though of course it comes at a price. Peter Stone, a political theorist at Trinity College, Dublin, and the author of The Luck of the Draw: The Role of Lotteries in Decision Making (2011), has made a career of studying the conditions under which such reasonless-ness can be, well, reasonable.

‘What lotteries are very good for is for keeping bad reasons out of decisions,’ Stone told me. ‘Lotteries guarantee that when you are choosing at random, there will be no reasons at all for one option rather than another being selected.’ He calls this the sanitising effectof lotteries – they eliminate all reasons from a decision, scrubbing away any kind of unwanted influence. As Stone acknowledges, randomness eliminates good reasons from the running as well as bad ones. He doesn’t advocate using chance indiscriminately. ‘But, sometimes,’ he argues, ‘the danger of bad reasons is bigger than the loss of the possibility of good reasons.’

For an example, let’s return to the Kantu’. Besides certain basic characteristics, when it comes to selecting a swidden site in the forest, there are no good reasons by which to choose a site. You just don’t know what the weather and pests will look like. As a result, any reasons that a Kantu’ farmer uses will either be neutral, or actively harmful. The sanitising effect of augury cleans out those bad reasons. The Kantu’ also establish fields in swampland, where the characteristics of a good site are much more predictable – where, in other words, good reasons are abundant. In the swamps, as it happens, the Kantu’ don’t use augury to make their pick.

Thinking about choice and chance in this way has applications outside rural Borneo, too. In particular, it can call into question some of the basic mechanisms of our rationalist-meritocratic-democratic system – which is why, as you might imagine, a political theorist such as Stone is so interested in randomness in the first place.

Around the same time that Michael Dove was pondering his riddle in a Kantu’ longhouse, activists and political scientists were beginning to revive the idea of filling certain political positions by lottery, a process known as sortition.

The practice has a long history. Most public officials in democratic Athens were chosen by lottery, including the nine archons who were chosen by sortition from a significant segment of the population. The nobles of Renaissance Venice used to select their head of state, the doge, through a complicated, partially randomised process. Jean-Jacques Rousseau, in The Social Contract (1762), argued that lotteries would be the norm in an ideal democracy, giving every citizen an equal chance of participating in every part of the government (Rousseau added that such ideal democracies did not exist). Sortition survives today in the process of jury selection, and it crops up from time to time in unexpected places. Ontario and British Columbia, for example, have used randomly selected panels of Canadian citizens to propose election regulations.

Advocates of sortition suggest applying that principle more broadly, to congresses and parliaments, in order to create a legislature that closely reflects the actual composition of a state’s citizenship. They are not (just to be clear) advocating that legislators randomly choosepolicies. Few, moreover, would suggest that non-representative positions such as the US presidency be appointed by a lottery of all citizens. The idea is not to banish reason from politics altogether. But plenty of bad reasons can influence the election process – through bribery, intimidation, and fraud; through vote-purchasing; through discrimination and prejudices of all kinds. The question is whether these bad reasons outweigh the benefits of a system in which voters pick their favourite candidates.

By way of illustration: a handful of powerful families and influential cliques dominated Renaissance Venice. The use of sortition in selection of the doge, writes the historian Robert Finlay in Politics in Renaissance Venice (1980), was a means of ‘limiting the ability of any group to impose its will without an overwhelming majority or substantial good luck’. Americans who worry about unbridled campaign-spending by a wealthy few might relate to this idea.

Or consider this. In theory, liberal democracies want legislatures that accurately reflect their citizenship. And, presumably, the qualities of a good legislator (intelligence, integrity, experience) aren’t limited to wealthy, straight, white men. The relatively homogeneous composition of our legislatures suggests that less-than-ideal reasons are playing a substantial role in the electoral process. Typically, we just look at this process and wonder how to eliminate that bias. Advocates of sortition see conditions ripe for randomness.

Once all good reasons are eliminated, the most efficient, most fair and most honest option might be chance

It’s not only politics where the threat of bad reasons, or a lack of any good reasons, makes the luck of the draw seem attractive. Take college admissions. When Columbia University accepts just 2,291 of its roughly 33,000 applicants, as it did this year, it’s hard to imagine that the process was based strictly on good reasons. ‘College admissions are already random; let’s just admit it and begin developing a more effective system,’ wrote the education policy analyst Chad Aldeman on the US daily news site Inside Higher Ed back in 2009. He went on to describe the notion of collegiate meritocracy as ‘a pretension’ and remarked: ‘A lottery might be the answer.’

The Swarthmore College professor Barry Schwartz, writing in The Atlantic in 2012, came to a similar conclusion. He proposed that, once schools have narrowed down their applicant pools to a well-qualified subset, they could just draw names. Some schools in the Netherlands already use a similar system. ‘A lottery like this won’t correct the injustice that is inherent in a pyramidal system in which not everyone can rise to the top,’ wrote Schwartz. ‘But it will reveal the injustice by highlighting the role of contingency and luck.’ Once certain standards are met, no really good reasons remain to discriminate between applicant No 2,291 (who gets into Columbia) and applicant No 2,292 (who does not). And once all good reasons are eliminated, the most efficient, most fair and most honest option might be chance.

But perhaps not the most popular one. When randomness is added to a supposedly meritocratic system, it can inspire quite a backlash. In 2004, the International Skating Union (ISU) introduced a new judging system for figure-skating competitions. Under this system – which has since been tweaked – 12 judges evaluated each skater, but only nine of those votes, selected at random, actually counted towards the final tally (the ancient Athenians judged drama competitions in a similar way). Figure skating is a notoriously corrupt sport, with judges sometimes forming blocs that support each other’s favoured skaters. In theory, a randomised process makes it harder to form such alliances. A tit-for-tat arrangement, after all, doesn’t work as well if it’s unclear whether your partners will be able to reciprocate.

But the new ISU rules did more than simply remove a temptation to collude. As statisticians pointed out, random selection will change the outcome of some events. Backing their claims with competition data, they showed how other sets of randomly selected votes would have yielded different results, actually changing the line-up of the medal podium in at least one major competition. Even once all the skaters had performed, ultimate victory depended on the luck of the draw.

There are two ways to look at this kind of situation. The first way – the path of outrage – condemns a system that seems fundamentally unfair. A second approach would be to recognise that the judging process is already subjective and always will be. Had a different panel of 12 judges been chosen for the competition, the result would have varied, too. The ISU system simply makes that subjectivity more apparent, even as it reduces the likelihood that certain obviously bad influences, such as corruption, will affect the final result.

Still, most commentators opted for righteous outrage. That isn’t surprising. The ISU system conflicts with two common modern assumptions: that it is always desirable (and usually possible) to eliminate uncertainty and chance from a situation; and that achievement is perfectly reflective of effort and talent. Sortition, college admission lotteries, and randomised judging run against the grain of both of these premises. They embrace uncertainty as a useful part of their processes, and they fail to guarantee that the better citizen or student or skater, no matter how much she drives herself to success, will be declared the winner.

Let me suggest that, in the fraught and unpredictable world in which we live, both of those ideals – total certainty and perfect reward – are delusional. That’s not to say that we shouldn’t try to increase knowledge and reward success. It’s just that, until we reach that utopia, we might want to come to terms with the reality of our situation, which is that our lives are dominated by uncertainty, biases, subjective judgments and the vagaries of chance.

In the novel The Man in the High Castle (1962), the American sci-fi maestro Philip K Dick imagines an alternative history in which Germany and Japan win the Second World War. Most of the novel’s action takes place in Japanese-occupied San Francisco, where characters, both Japanese and American, regularly use the I Ching to guide difficult decisions in their business lives and personal affairs.

Something, somewhere, is always playing dice

As an American with no family history of divination, I’ll admit to being enchanted by Dick’s vision of a sci-fi world where people yield some of their decision-making power to the movements of dried yarrow stems. There’s something liberating, maybe, in being able to acknowledge that the reasons we have are often inadequate, or downright poor. Without needing to impose any supernatural system, it’s not hard to picture a society in which chance plays a more explicit, more accepted role in the ways in which we distribute goods, determine admissions to colleges, give out jobs to equally matched applicants, pick our elected leaders, and make personal decisions in our own lives.

Such a society is not a rationalist’s nightmare. Instead, in an uncertain world where bad reasons do determine so much of what we decide, it’s a way to become more aware of what factors shape the choices we make. As Peter Stone told me, paraphrasing Immanuel Kant, ‘the first task of reason is to recognise its own limitations’. Nor is such a society more riddled with chanciness than our own. Something, somewhere, is always playing dice. The roles of coloniser and colonised, wealthy and poor, powerful and weak, victor and vanquished, are rarely as predestined as we imagine them to be.

Dick seems to have understood this. Certainly, he embraced chance in a way that few other novelists ever have. Years after he wrote The Man in the High Castle, Dick explained to an interviewer that, setting aside from planning and the novelist’s foresight, he had settled key details of the book’s plot by flipping coins and consulting the I Ching.

14 July 2014

Se falta água, o problema é de planejamento, diz especialista (Projeto 2000 e água)

22/7/2014 – 01h21

por Projeto 2000 e água

represa Se falta água, o problema é de planejamento, diz especialista

 

O planejamento do uso de recursos hídricos é fundamental, como aponta o professor da USP, na entrevista abaixo. Porém, é preciso ter em mente que a água que, apesar de ser comum dizer que a Terra é o planeta água, apenas 2,5% desse recurso na Terra é doce – ou seja, pode ser usado para consumo próprio. A maior parte dela está aprisionada em aquíferos subterrâneos e geleiras. Só 0,26% da água doce da Terra está em lagos, reservatórios e bacias hidrográficas, mais acessíveis ao homem e a atividades econômicas. Isso significa dizer que apenas 0,0065% da água na Terra é água doce disponível. Em resumo: se toda a água da Terra coubesse em um balde de 10 litros, a água doce disponível chegaria a apenas 13 gotas. (Comentário do Akatu)

Segundo dados da Comissão Pastoral da Terra, o Brasil tem um conflito violento por dia por causa da água. Muitas destas disputas ocorrem para evitar a apropriação de recursos hídricos por empresas ou para impedir a construção de barragens. Em março deste ano, foi a vez dos governos de Rio e São Paulo entrarem em atrito. Sob pressão da crise de abastecimento, o governo paulista pediu ao governo federal o desvio das águas do rio Paraíba do Sul, que nasce em São Paulo e também corta cidades mineiras e fluminenses.

Diante deste cenário de tensão, veículos de comunicação não pouparam manchetes anunciando uma “guerra por água”. Para o professor de Geografia da USP Luis Antonio Bittar Venturi, no entanto, a mídia é “fatalista” quando coloca a escassez como origem dos conflitos. “A água é o recurso mais abundante do planeta. Se existe falta d’água em alguns lugares, isto é problema de planejamento”, afirma. Confira a seguir os melhores trechos da entrevista, do projeto 2000 e água:

Luis 300x197 Se falta água, o problema é de planejamento, diz especialista

Como você avalia o discurso de veículos de comunicação que anunciam escassez e guerra por água?

A mídia é muito fatalista. Vende-se mais se você anunciar fome, conflito e guerra. Thomas Malthus dizia que o mundo vai passar fome porque a produção de alimentos é mais lenta que o crescimento da população. Essa é uma afirmação que não considera que o planejamento e a técnica podem reverter isso. É a mesma coisa com a água. Falar que ela vai acabar é um tremendo absurdo. A água doce vem do oceano, via evaporação e precipitação. Esse é um sistema que nunca vai acabar, a não ser que a Terra acabe.

Se a água é um recurso abundante, por que estamos passando por uma crise hídrica na Região Metropolitana de São Paulo?

É falta de planejamento a médio e longo prazo. Em São Paulo, o clima é tropical úmido, então a recarga de água vinda do Oceano está assegurada. A recarga é muito maior do que a água que conseguimos usar, só que, por uma questão de mau planejamento, há muita demanda concentrada nas metrópoles. Além disso, falta incorporar no planejamento dados científicos, que existem e estão disponíveis. Mas o poder público prefere culpar a natureza.

A falta d’água em São Paulo gerou a polêmica do desvio do Rio Paraíba do Sul para abastecer o Sistema Cantareira, gerando um conflito entre os governos de Rio e São Paulo. Isso, para você, não seria um conflito por falta de água?

Uma bacia hidrográfica é um sistema integrado e deve ser gerida por inteiro, independentemente de quantos Estados a compartilhem. Internamente aos países existem conflitos, mas eles são usados como bandeira política, porque tem forte apelo emocional: “Ah, São Paulo está roubando a água”, o que é uma besteira. A água é o recurso mais abundante no planeta. Se existe falta d’água em alguns lugares, isto é problema de planejamento.

Que mudanças no planejamento ajudariam a resolver o problema?

Fazer a interligação dos sistemas Cantareira com Alto Cotia e Guarapiranga. Enquanto o Sistema Cantareira estava com 11% da sua capacidade, o Alto Cotia estava com 77%! Não é falta d’água! Outro ponto: o volume de perda na distribuição na SABESP é acima de 30%, devido a ligações clandestinas e vazamentos. Resolver isto seria como produzir 30% a mais de água. Além destas questões, só agora há um sistema para usar o volume morto dos reservatórios, que é meramente uma questão técnica.

No Brasil 34 milhões de pessoas não têm acesso à água potável. Como você avalia esse cenário?

A água, embora seja o recurso mais abundante do mundo, não se distribui de forma equitativa pelo globo. Então, cabe ao homem planejar. Toda vez que há uma população acometida pela escassez hídrica, a culpa é o problema social, e não um problema natural.

Parte do problema de acesso também é reflexo das diferenças sociais?

Há dois tipos de escassez. O chamado estresse hídrico natural é quando um lugar não tem água mesmo, mas você pode resolver isso de alguma forma, como os dessalinizadores usados na Península Arábica. E o estresse socioeconômico, que ocorre em locais de pobreza e sem um planejamento adequado. É uma irracionalidade de planejamento na Amazônia haver problemas de saúde e alta taxa de mortalidade infantil por falta de acesso a água de qualidade. As embarcações que levam mercadorias de Manaus para o interior da Amazônia estão apilhadas de garrafões de água mineral comprados.

Há algo que esteja sendo feito?

Existe um projeto do Governo Federal de construção de cisternas em casas de comunidades rurais da região Nordeste, e que está, de fato, fazendo grande diferença na vida desta população. Então, se isso for suficiente, basta. Agora, para você desenvolver a agricultura, é necessário mais do que isto. Aí é preciso transposição do rio São Francisco, da qual eu sou a favor. É tirar 1% de sua água para tornar perenes as bacias que são intermitentes. Depende do contexto. Não há uma fórmula que sirva para todas as regiões.

Os mais de 70% de água destinada à agricultura não fazem falta para outros setores?

Essa é uma média mundial. A agricultura é o setor que mais consome água. Mas ela nem sempre é potável. No interior do Brasil, a água é bombeada diretamente do Rio. Já na Síria há em todo lugar duas torneiras: uma que você pode beber e outra que você não pode. A que você não pode beber é usada para limpeza e a água de reuso também vai para a agricultura.Quanto ao uso doméstico, é preciso ter um mínimo assegurado. O mínimo mesmo, que em uma situação crítica são 100 m³/ ano por habitante, e que é a situação natural de vários países, principalmente na Península Arábica. Mas eles conseguem, por meio do planejamento e da técnica, ter um abastecimento per capita do mesmo nível de alguns países europeus e de lugares que têm bastante água.

Você é otimista nas perspectivas de que o Brasil vá se atentar mais à questão do planejamento hídrico?

Eu tendo a ser. O problema é que a gente sempre corre atrás do prejuízo. Precisa vir uma crise de abastecimento para a Sabesp e o governo do Estado acordarem. Mas o ideal seria um planejamento mais eficiente e adequado, que evitasse a necessidade de passar por períodos de racionamento de água e energia.

Leia aqui a reportagem hipermídia que retrata crise de água em São Paulo.

* Publicado originalmente no site 200 e água e retirado do site Akatu.

(Akatu)

Mudanças climáticas de longo prazo provocam mais migrações do que os desastres naturais (O Globo)

JC e-mail 4976, de 24 de junho de 2014

Aumento da temperatura é a principal razão de deslocamentos

Quatro meses atrás, o vulcão Sinabung entrou em erupção na Indonésia, esvaziando as aldeias vizinhas, cobertas de cinzas. Cerca de 100 mil pessoas deixaram suas casas, mas a grande maioria voltou semanas depois. Esse é um retrato de como um desastre natural espanta uma população sem afugentá-la definitivamente. Agora, um estudo das universidades americanas de Princeton e Califórnia e do Escritório Nacional de Pesquisa Econômica dos Estados Unidos afirma que as mudanças climáticas, que ocorrem a longo prazo, provocam mais migrações do que as catástrofes isoladas.

Segundo os pesquisadores, a temperatura e o índice de chuvas são os principais motivadores para as migrações definitivas. Com o avanço dos eventos extremos nas próximas décadas, cada vez mais áreas vão se tornar inabitáveis, e o contingente dos chamados refugiados climáticos deve explodir.

No estudo, publicado na revista “Proceedings of the National Academy of Sciences”, os cientistas acompanharam por 15 anos o deslocamento de sete mil famílias da Indonésia. O país, que é o maior arquipélago do mundo, tem uma população de cerca de 250 milhões de pessoas. Aproximadamente 40% dependem da agricultura, e muitos vivem em áreas costeiras. São regiões altamente vulneráveis ao aumento do nível do mar e outros efeitos ligados às mudanças climáticas.

DESERTIFICAÇÃO É OUTRA CAUSA
Com base nos registros, a pesquisa mostrou que o número de refugiados climáticos é maior em locais onde cresceu a temperatura média do país, que é de 25,1 graus Celsius. Segundo o estudo, isso ocorreu porque o aumento dos termômetros compromete o rendimento das culturas agrícolas. As chuvas teriam um papel mais tímido nas migrações definitivas.

Vice-presidente do Painel Intergovernamental de Mudanças Climáticas, Suzana Kahn concorda com os resultados do estudo.

– Uma população pode acreditar que um episódio isolado, como um vulcão, logo vai se resolver – lembra Suzana, que também é professora da Coppe/UFRJ. – Mas as mudanças climáticas vão obrigar que estas pessoas se retirem definitivamente de suas regiões. É um fenômeno já visto nos pequenos países do Pacífico, que já negociam uma migração definitiva para a Nova Zelândia, por causa do aumento do nível do mar.

A desertificação no Norte da África também provoca a migração de milhares de pessoas para o Sul da Europa. Esse deslocamento tem levado ao crescimento de legendas de extrema-direita, hostis à chegada dos refugiados climáticos.

– A migração de grandes populações também tem consequências econômicas – ressalta Suzana. – Na Europa, por exemplo, a resistência aos africanos é grande porque eles aceitam condições de trabalho muito desfavoráveis. No Ártico, o derretimento de geleiras proporciona a escavação de novos poços de petróleo, o que atrairia muitas pessoas e empresas.

(Renato Grandelle / O Globo)
http://oglobo.globo.com/sociedade/ciencia/mudancas-climaticas-de-longo-prazo-provocam-mais-migracoes-do-que-os-desastres-naturais-12988197#ixzz35ZVsrLCU

Maio de 2014 foi o mais quente do mundo desde 1880 (AFP)

JC e-mail 4976, de 24 de junho de 2014

A temperatura média na superfície terrestre e dos oceanos atingiu 15,54 graus Celsius em maio, isto é, 0,74°C a mais que a média de 14,8°C no século XX

O mês de maio de 2014 foi o mais quente no mundo desde que começaram a subir as temperaturas em 1880, anunciou nesta segunda-feira a Agência Americana Oceânica e Atmosférica (NOAA).

A temperatura média na superfície terrestre e dos oceanos atingiu 15,54 graus Celsius em maio, isto é, 0,74°C a mais que a média de 14,8°C no século XX.

Também foi o 39º mês de maio consecutivo e o 351º mês seguido em que a temperatura global do planeta esteve acima da média do século XX, explicou a NOAA.

A última vez em que a temperatura de um mês de maio foi inferior à média do século XX remontava a 1976. O último mês em que a temperatura esteve abaixo da média no século passado foi em fevereiro de 1985.

A maior parte do planeta viveu em maio deste ano temperaturas mais quentes do que a média com picos de calor no leste do Cazaquistão, partes da Indonésia e o noroeste da Austrália, entre outros.

No entanto, partes do nordeste do Atlântico e locais limitados no noroeste e sudoeste do Pacífico, assim como nas águas oceânicas do sul da América, foram mais frias do que a média.

A temperatura de abril de 2014 esteve a par com a de 2010, que tinha sido a mais quente registrada no planeta aquele mês desde 1880, segundo a NOAA.

Segundo prognósticos da NOAA, há 70% de probabilidades de que a corrente quente do Pacífico El Niño volte a aparecer este verão no hemisfério norte e 80% de possibilidades de que surja durante o outono e inverno próximos, o que poderia ter um impacto importante nas temperaturas e nas precipitações em todo o mundo.

(AFP, via portal Terra)
http://noticias.terra.com.br/ciencia/clima/maio-de-2014-foi-o-mais-quente-do-mundo-desde-1880,4a14fb2e8d9c6410VgnCLD200000b1bf46d0RCRD.html

Saving the world should be based on promise, not fear (The Guardian)

For 30 years I banged on about threats. But research shows we must to be true to ourselves – and to the wonder in nature

Monday 16 June 2014 20.41 BST

Le Conte Glacier, alaska

Le Conte Glacier, Alaska: ‘Almost everyone I know in this field is motivated by the love and ­enchantment nature inspires.’ Photograph: Ernest Manewal/Purestock/Super

If we had set out to alienate and antagonise the people we’ve been trying to reach, we could scarcely have done it better. This is how I feel, looking back on the past few decades of environmental campaigning, including my own.

This thought is prompted by responses to the column I wrote last week. It examined the psychological illiteracy that’s driving leftwing politics into oblivion. It argued that the failure by Labour and Democratic party strategists to listen to psychologists and cognitive linguists has resulted in a terrible mistake: the belief that they can best secure their survival by narrowing the distance between themselves and their conservative opponents.

Twenty years of research, comprehensively ignored by these parties, reveals that shifts such as privatisation and cutting essential public services strongly promote people’s extrinsic values (an attraction to power, prestige, image and status) while suppressing intrinsic values (intimacy, kindness, self-acceptance, independent thought and action). As extrinsic values are powerfully linked to conservative politics, pursuing policies that reinforce them is blatantly self-destructive.

One of the drivers of extrinsic values is a sense of threat. Experimental work suggests that when fears are whipped up, they trigger an instinctive survival response. You suppress your concern for other people and focus on your own interests. Conservative strategists seem to know this, which is why they emphasise crime, terrorism, deficits and immigration.

“Isn’t this what you’ve spent your life doing?” several people asked. “Emphasising threats?” It took me a while. If threats promote extrinsic values and if (as the research strongly suggests) extrinsic values are linked to a lack of interest in the state of the living planet, I’ve been engaged in contradiction and futility. For about 30 years. The threats, of course, are of a different nature: climate breakdown, mass extinction, pollution and the rest. And they are real. But there’s no obvious reason why the results should be different. Terrify the living daylights out of people, and they will protect themselves at the expense of others and of the living world.

It’s an issue taken up in a report by several green groups called Common Cause for Nature. “Provoking feelings of threat, fear or loss may successfully raise the profile of an issue,” but “these feelings may leave people feeling helpless and increasingly demotivated, or even inclined to actively avoid the issue”. People respond to feelings of insecurity “by attempting to exert control elsewhere, or retreating into materialistic comforts”.

Where we have not used threat and terror, we have tried money: an even graver mistake. Nothing better reinforces extrinsic values than putting a price on nature, or appealing to financial self-interest. It doesn’t work, even on its own terms. A study published in Nature Climate Change tested two notices placed in a filling station. One asked: “Want to protect the environment? Check your car’s tyre pressure.” The other tried: “Want to save money? Check your car’s tyre pressure.” The first was effective, the second useless.

We’ve tended to assume people are more selfish than they really are. Surveys across 60 countries show that most people consistently hold concern for others, tolerance, kindness and thinking for themselves to be more important than wealth, image and power. But those whose voices are loudest belong to a small minority with the opposite set of values. And often, idiotically, we have sought to appease them.

This is a form of lying – to ourselves and other people. I don’t know anyone who became an environmentalist because she or he was worried about ecological impacts on their bank balance. Almost everyone I know in this field is motivated by something completely different: the love and wonder and enchantment nature inspires. Yet, perhaps because we fear we will not be taken seriously, we scarcely mention them. We hide our passions behind columns of figures. Sure, we need the numbers and the rigour and the science, but we should stop pretending these came first.

Without being fully conscious of the failure and frustration that’s been driving it, I’ve been trying, like others, to promote a positive environmentalism, based on promise, not threat.

This is what rewilding, the mass restoration of ecosystems, is all about; and why I wrote my book Feral, which is a manifesto for rewilding – and for wonder and enchantment. But I’m beginning to see that this is not just another method: expounding a positive vision should be at the centre of attempts to protect the things we love. An ounce of hope is worth a ton of despair.

Part of this means changing the language. The language we use to describe our relations with nature could scarcely be more alienating. “Reserve” is alienation itself, or at least detachment: think of what it means when you apply that word to people. “Site of special scientific interest”, “no-take zone“, “ecosystem services”: these terms are a communications disaster. Even “environment” is a cold and distancing word, which creates no pictures. These days I tend to use natural world or living planet, which invoke vivid images. One of the many tasks for the rewilding campaign some of us will be launching in the next few months is to set up a working group to change the language. There’s a parallel here with the Landreader project by the photographer Dominick Tyler, which seeks to rescue beautiful words describing nature from obscurity.

None of this is to suggest that we should not discuss the threats or pretend that the crises faced by this magnificent planet are not happening. Or that we should cease to employ rigorous research and statistics. What it means is that we should embed both the awareness of these threats and their scientific description in a different framework: one that emphasises the joy and awe to be found in the marvels at risk; one that proposes a better world, rather than (if we work really hard for it), just a slightly-less-shitty-one-than-there-would-otherwise-have-been.

Above all, this means not abandoning ourselves to attempts to appease a minority who couldn’t give a cuss about the living world, but think only of their wealth and power. Be true to yourself and those around you, and you will find the necessary means of reaching others.

• Twitter: @georgemonbiot. A fully referenced version of this article can be found at monbiot.com

The Coming Climate Crash (New York Times)

Carbon dioxide emissions like those from coal-fired power plants should be taxed to spur energy innovation. Credit Luke Sharrett for The New York Times

THERE is a time for weighing evidence and a time for acting. And if there’s one thing I’ve learned throughout my work in finance, government and conservation, it is to act before problems become too big to manage.

For too many years, we failed to rein in the excesses building up in the nation’s financial markets. When the credit bubble burst in 2008, the damage was devastating. Millions suffered. Many still do.

We’re making the same mistake today with climate change. We’re staring down a climate bubble that poses enormous risks to both our environmentand economy. The warning signs are clear and growing more urgent as the risks go unchecked.

This is a crisis we can’t afford to ignore. I feel as if I’m watching as we fly in slow motion on a collision course toward a giant mountain. We can see the crash coming, and yet we’re sitting on our hands rather than altering course.

We need to act now, even though there is much disagreement, including from members of my own Republican Party, on how to address this issue while remaining economically competitive. They’re right to consider the economic implications. But we must not lose sight of the profound economic risks of doing nothing.

The solution can be a fundamentally conservative one that will empower the marketplace to find the most efficient response. We can do this by putting a price on emissions of carbon dioxide — a carbon tax. Few in the United States now pay to emit this potent greenhouse gas into the atmosphere we all share. Putting a price on emissions will create incentives to develop new, cleaner energy technologies.

It’s true that the United States can’t solve this problem alone. But we’re not going to be able to persuade other big carbon polluters to take the urgent action that’s needed if we’re not doing everything we can do to slow our carbon emissions and mitigate our risks.

I was secretary of the Treasury when the credit bubble burst, so I think it’s fair to say that I know a little bit about risk, assessing outcomes and problem-solving. Looking back at the dark days of the financial crisis in 2008, it is easy to see the similarities between the financial crisis and the climate challenge we now face.

We are building up excesses (debt in 2008, greenhouse gas emissions that are trapping heat now). Our government policies are flawed (incentivizing us to borrow too much to finance homes then, and encouraging the overuse of carbon-based fuels now). Our experts (financial experts then, climate scientists now) try to understand what they see and to model possible futures. And the outsize risks have the potential to be tremendously damaging (to a globalized economy then, and the global climate now).

Back then, we narrowly avoided an economic catastrophe at the last minute by rescuing a collapsing financial system through government action. But climate change is a more intractable problem. The carbon dioxide we’re sending into the atmosphere remains there for centuries, heating up the planet.

That means the decisions we’re making today — to continue along a path that’s almost entirely carbon-dependent — are locking us in for long-term consequences that we will not be able to change but only adapt to, at enormous cost. To protect New York City from rising seas and storm surges is expected to cost at least $20 billion initially, and eventually far more. And that’s just one coastal city.

New York can reasonably predict those obvious risks. When I worry about risks, I worry about the biggest ones, particularly those that are difficult to predict — the ones I call small but deep holes. While odds are you will avoid them, if you do fall in one, it’s a long way down and nearly impossible to claw your way out.

Scientists have identified a number of these holes — potential thresholds that, once crossed, could cause sweeping, irreversible changes. They don’t know exactly when we would reach them. But they know we should do everything we can to avoid them.

Already, observations are catching up with years of scientific models, and the trends are not in our favor.

Fewer than 10 years ago, the best analysis projected that melting Arctic sea ice would mean nearly ice-free summers by the end of the 21st century. Now the ice is melting so rapidly that virtually ice-free Arctic summers could be here in the next decade or two. The lack of reflective ice will mean that more of the sun’s heat will be absorbed by the oceans, accelerating warming of both the oceans and the atmosphere, and ultimately raising sea levels.

Even worse, in May, two separate studies discovered that one of the biggest thresholds has already been reached. The West Antarctic ice sheet has begun to melt, a process that scientists estimate may take centuries but that could eventually raise sea levels by as much as 14 feet. Now that this process has begun, there is nothing we can do to undo the underlying dynamics, which scientists say are “baked in.” And 10 years from now, will other thresholds be crossed that scientists are only now contemplating?

It is true that there is uncertainty about the timing and magnitude of these risks and many others. But those who claim the science is unsettled or action is too costly are simply trying to ignore the problem. We must see the bigger picture.

The nature of a crisis is its unpredictability. And as we all witnessed during the financial crisis, a chain reaction of cascading failures ensued from one intertwined part of the system to the next. It’s easy to see a single part in motion. It’s not so easy to calculate the resulting domino effect. That sort of contagion nearly took down the global financial system.

With that experience indelibly affecting my perspective, viewing climate change in terms of risk assessment and risk management makes clear to me that taking a cautiously conservative stance — that is, waiting for more information before acting — is actually taking a very radical risk. We’ll never know enough to resolve all of the uncertainties. But we know enough to recognize that we must act now.

I’m a businessman, not a climatologist. But I’ve spent a considerable amount of time with climate scientists and economists who have devoted their careers to this issue. There is virtually no debate among them that the planet is warming and that the burning of fossil fuels is largely responsible.

Farseeing business leaders are already involved in this issue. It’s time for more to weigh in. To add reliable financial data to the science, I’ve joined with the former mayor of New York City, Michael R. Bloomberg, and the retired hedge fund manager Tom Steyer on an economic analysis of the costs of inaction across key regions and economic sectors. Our goal for the Risky Business project — starting with a new study that will be released this week — is to influence business and investor decision making worldwide.

We need to craft national policy that uses market forces to provide incentives for the technological advances required to address climate change. As I’ve said, we can do this by placing a tax on carbon dioxide emissions. Many respected economists, of all ideological persuasions, support this approach. We can debate the appropriate pricing and policy design and how to use the money generated. But a price on carbon would change the behavior of both individuals and businesses. At the same time, all fossil fuel — and renewable energy — subsidies should be phased out. Renewable energy can outcompete dirty fuels once pollution costs are accounted for.

Some members of my political party worry that pricing carbon is a “big government” intervention. In fact, it will reduce the role of government, which, on our present course, increasingly will be called on to help communities and regions affected by climate-related disasters like floods, drought-related crop failures and extreme weather like tornadoes, hurricanes and other violent storms. We’ll all be paying those costs. Not once, but many times over.

This is already happening, with taxpayer dollars rebuilding homes damaged by Hurricane Sandy and the deadly Oklahoma tornadoes. This is a proper role of government. But our failure to act on the underlying problem is deeply misguided, financially and logically.

In a future with more severe storms, deeper droughts, longer fire seasons and rising seas that imperil coastal cities, public funding to pay for adaptations and disaster relief will add significantly to our fiscal deficit and threaten our long-term economic security. So it is perverse that those who want limited government and rail against bailouts would put the economy at risk by ignoring climate change.

This is short-termism. There is a tendency, particularly in government and politics, to avoid focusing on difficult problems until they balloon into crisis. We would be fools to wait for that to happen to our climate.

When you run a company, you want to hand it off in better shape than you found it. In the same way, just as we shouldn’t leave our children or grandchildren with mountains of national debt and unsustainable entitlement programs, we shouldn’t leave them with the economic and environmental costs of climate change. Republicans must not shrink from this issue. Risk management is a conservative principle, as is preserving our natural environment for future generations. We are, after all, the party of Teddy Roosevelt.

THIS problem can’t be solved without strong leadership from the developing world. The key is cooperation between the United States and China — the two biggest economies, the two biggest emitters of carbon dioxide and the two biggest consumers of energy.

When it comes to developing new technologies, no country can innovate like America. And no country can test new technologies and roll them out at scale quicker than China.

The two nations must come together on climate. The Paulson Institute at the University of Chicago, a “think-and-do tank” I founded to help strengthen the economic and environmental relationship between these two countries, is focused on bridging this gap.

We already have a head start on the technologies we need. The costs of the policies necessary to make the transition to an economy powered by clean energy are real, but modest relative to the risks.

A tax on carbon emissions will unleash a wave of innovation to develop technologies, lower the costs of clean energy and create jobs as we and other nations develop new energy products and infrastructure. This would strengthen national security by reducing the world’s dependence on governments like Russia and Iran.

Climate change is the challenge of our time. Each of us must recognize that the risks are personal. We’ve seen and felt the costs of underestimating the financial bubble. Let’s not ignore the climate bubble.

Imponderável futebol clube (Ciência Hoje)

Empolgado com os jogos da Copa do Mundo no Brasil, Adilson de Oliveira lança mão da física para tratar em sua coluna de junho das circunstâncias indefiníveis que podem interferir no resultado de uma partida.

Por: Adilson de Oliveira

Publicado em 20/06/2014 | Atualizado em 20/06/2014

Imponderável futebol clube

O atacante Neymar, da seleção brasileira, é candidato a craque da Copa do Mundo no Brasil. Mas, como no futebol o imponderável não pode ser desprezado, será preciso esperar para ver se a previsão se confirma. (foto: Hao Ke/ Flickr – CC BY-NC-SA 2.0)

Estamos novamente em época de Copa do Mundo, o maior evento esportivo mundial, que ocorre a cada quatro anos – desta vez no Brasil. Apesar de todos os contratempos, como atrasos nas obras de infraestrutura e na construção de estádios, protestos, greves etc., a Copa começou e praticamente todas as pessoas ficam ligadas nos jogos.

Para nós, brasileiros, os maiores campeões das Copas e do futebol mundial (só não temos a medalha de ouro olímpica), há a grande expectativa do sexto título. Afinal, jogamos em casa, temos um time com grandes jogadores, que atuam nos melhores clubes do mundo (temos Neymar!), ganhamos a Copa das Confederações no ano passado, vencendo, na final, a Espanha, última campeã mundial.

Contudo, o futebol talvez seja o esporte coletivo mais imprevisível que existe. No basquete, voleibol, handebol etc., dezenas de pontos são marcados em uma partida, e um time muito superior tecnicamente dificilmente perde para o mais fraco. No futebol nem sempre isso é verdade. Apenas uma pequena falha muda o resultado do jogo. Como costumava dizer o famoso jornalista e radialista esportivo Benjamim Wright, “o futebol é uma caixinha de surpresas”.

As Copas do Mundo são famosas por resultados inusitados. Para nós, brasileiros, o maior trauma foi perder a final da Copa de 1950, em pleno Maracanã, no jogo em que precisávamos apenas de um empate com o Uruguai. Em um lance, o jogador uruguaio Ghiggia calou 200 mil pessoas. Se fosse possível voltar no tempo, com certeza gostaríamos de mudar esse resultado (veja a coluna A Copa e as viagens no tempo).

Uma partida de futebol é o que chamamos de um problema complexo com múltiplas variáveis

Será que podemos tentar entender essa imponderabilidade do futebol? A física pode ajudar nisso?

Uma partida de futebol é o que chamamos de um problema complexo com múltiplas variáveis. Temos 22 jogadores (cada um com a sua própria vontade) distribuídos em dois times em um campo que não é exatamente do mesmo tamanho em todos os estádios. O Maracanã tem 110 m x 75 m ou 8.250 m2 (375 m2 por jogador).

Diferentes condições, como clima (na Copa do Mundo teremos partidas na fria Porto Alegre e na abafada Manaus), condicionamento físico dos atletas e, principalmente, habilidades técnicas e táticas de cada jogador, para citar apenas algumas, podem interferir no resultado de um jogo.

Dessa forma, tentar explicar o resultado de uma partida de futebol tentando equacionar todas essas variáveis parece algo impossível de resolver. Da mesma maneira, muitos problemas físicos são muito complexos para ser resolvidos de uma forma exata, mas podemos resolvê-los se fizermos abordagens diferentes, com algumas aproximações e simplificações.

Por exemplo, se quisermos compreender o comportamento de um gás em um determinado volume (como dentro de uma sala), dependendo da abordagem utilizada isso pode se transformar em um problema insolúvel. Em uma sala de 27 m3 de volume (3 m x 3 m x 3 m), temos cerca de 1026 moléculas (10 seguido de 26 zeros!). Se quisermos descrever o movimento de cada molécula individualmente, teremos 1026 equações de movimento acopladas. Esse é um problema impossível de ser resolvido do ponto de vista matemático.

Não podemos tentar prever o movimento de cada jogador em uma partida de futebol. Diferentemente das moléculas de um gás, cada jogador tem características diferentes e vontade própria para decidir o que fará no jogo

Por outro lado, se, em vez de considerarmos o movimento de cada molécula, quisermos descrever propriedades que representam o comportamento como um todo, podemos obter informações importantes. Se descrevermos estatisticamente as colisões das moléculas nas paredes da sala, poderemos calcular a pressão, a temperatura e o volume do gás. Esse modelo é muito simplificado, mas permite calcular com boa precisão essas propriedades de um gás, que são de fato as relevantes para se determinar seu comportamento.

Não podemos tentar prever da mesma maneira o movimento de cada jogador em uma partida de futebol. Diferentemente das moléculas de um gás, cada jogador tem características diferentes e, principalmente, tem vontade própria para decidir cada movimento que fará no jogo. Mas podemos tentar compreender o comportamento coletivo dos jogadores e a forma de cada um se posicionar durante a partida em função do esquema tático proposto pelo técnico.

Como seria muita pretensão minha tentar descrever o comportamento dos jogadores em uma partida de futebol da mesma maneira que é possível fazer com um gás, como todo torcedor que acha que entende de futebol, vou apenas dar alguns palpites, apontar algumas variáveis que talvez sejam as mais relevantes.

Esquemas táticos e lances mágicos

Normalmente os técnicos de futebol apontam que o fator campo é determinante para a vitória do time. Campos maiores tendem a favorecer times que atacam muito, pois há mais espaço para a movimentação dos jogadores; campos menores favorecem times que jogam com postura mais defensiva, pois há menos espaço para a movimentação da bola. A torcida predominante de um time costuma incentivar mais os jogadores, e estes se empenham mais. Mas, se não estiverem jogando bem, a torcida maior pode vaiar e atrapalhar o time.

O futebol, por ser um jogo coletivo, faz com que os técnicos posicionem os jogadores com diferentes esquemas táticos, representados por números como 4-4-2 (quatro defensores, quatro meio-campistas e dois atacantes), 3-5-2 (três defensores, cinco meio-campistas e dois atacantes) ou o esquema da moda, 4-3-2-1 (quatro defensores, três meio-campistas, dois meias-atacantes e um centroavante).

Cobrança de falta

Seleção brasileira prepara-se para cobrar uma falta em partida contra a Bielorrússia em 2012. No futebol moderno, os lances de bola parada são extremamente perigosos e têm sido responsáveis por cerca de 70% dos gols feitos ultimamente em disputas de alto nível. (foto: Flickr/ daniel0685 – CC BY 2.0)

Cada esquema funciona ou não dependendo de cada jogador que vai ocupar ou não a posição. Times com muitos atacantes nem sempre ganham as partidas. Ao contrário, geralmente perdem, porque, para se ganhar um jogo, é necessário não apenas fazer gols, mas também não tomar gols.

Da mesma forma que um gás em uma sala, se o time estiver espalhado por todo o campo, ficando os jogadores muito distantes uns dos outros, haverá poucas interações entre eles, dificultando as trocas de bolas. Quando o time faz pressão na marcação, ou seja, os jogadores se aproximam muito dos adversários, normalmente consegue tomar posse da bola e atacar. Como em um gás, quando aumentamos a pressão, as moléculas vão para determinada direção. No futebol, essa direção é a meta do adversário.

Da mesma forma que um gás em uma sala, se o time estiver espalhado por todo o campo, ficando os jogadores muito distantes uns dos outros, haverá poucas interações entre eles, dificultando as trocas de bolas

Mas, se aumentarmos muito a pressão, pode ocorrer um vazamento, fazendo com que o gás escape do recipiente em que se encontra. Na partida de futebol, se todo o time estiver pressionando o adversário, um deles pode escapar e ir na direção oposta, surpreendendo o time que está pressionando. É o famoso contra-ataque. Uma arrancada de um jogador, driblando todo um time, como a que redundou no antológico gol de Maradona contra a Inglaterra na Copa de 1986, é um exemplo disso.

Outro exemplo de jogada que pode ser decisiva em um jogo são os lances de bola parada. Um escanteio, uma falta ou um pênalti são lances que costumam ser muito perigosos no futebol. É nesses momentos, em que os jogadores se posicionam normalmente em uma jogada ensaiada ou chutam a bola diretamente para a meta, que ocorrem grandes chances de gol. Nesse caso, tenta-se colocar a bola com precisão, esperando que ela interaja o menos possível, pois qualquer toque pode desviá-la do alvo.

O futebol é um esporte maravilhoso e emocionante. Em frações de segundo, decisões que sequer são raciocinadas produzem lances mágicos e memoráveis. Gênios do futebol como Pelé, Garrincha e Maradona, entre muitos outros, produziram em Copas do Mundo momentos inesquecíveis do futebol. Esperamos que essa Copa no Brasil também nos deixe na memória lances que contaremos para as futuras gerações, principalmente se forem da nossa seleção.

Adilson de Oliveira
Departamento de Física
Universidade Federal de São Carlos

The Turning Point: New Hope for the Climate (Rolling Stone)

It’s time to accelerate the shift toward a low-carbon future

JUNE 18, 2014

In the struggle to solve the climate crisis, a powerful, largely unnoticed shift is taking place. The forward journey for human civilization will be difficult and dangerous, but it is now clear that we will ultimately prevail. The only question is how quickly we can accelerate and complete the transition to a low-carbon civilization. There will be many times in the decades ahead when we will have to take care to guard against despair, lest it become another form of denial, paralyzing action. It is true that we have waited too long to avoid some serious damage to the planetary ecosystem – some of it, unfortunately, irreversible. Yet the truly catastrophic damages that have the potential for ending civilization as we know it can still – almost certainly – be avoided. Moreover, the pace of the changes already set in motion can still be moderated significantly.

Global Warming’s Terrifying New Math

There is surprising – even shocking – good news: Our ability to convert sunshine into usable energy has become much cheaper far more rapidly than anyone had predicted. The cost of electricity from photovoltaic, or PV, solar cells is now equal to or less than the cost of electricity from other sources powering electric grids in at least 79 countries. By 2020 – as the scale of deployments grows and the costs continue to decline – more than 80 percent of the world’s people will live in regions where solar will be competitive with electricity from other sources.

No matter what the large carbon polluters and their ideological allies say or do, in markets there is a huge difference between “more expensive than” and “cheaper than.” Not unlike the difference between 32 degrees and 33 degrees Fahrenheit. It’s not just a difference of a degree, it’s the difference between a market that’s frozen up and one that’s liquid. As a result, all over the world, the executives of companies selling electricity generated from the burning of carbon-based fuels (primarily from coal) are openly discussing their growing fears of a “utility death spiral.”

Germany, Europe’s industrial powerhouse, where renewable subsidies have been especially high, now generates 37 percent of its daily electricity from wind and solar; and analysts predict that number will rise to 50 percent by 2020. (Indeed, one day this year, renewables created 74 percent of the nation’s electricity!)

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What’s more, Germany’s two largest coal-burning utilities have lost 56 percent of their value over the past four years, and the losses have continued into the first half of 2014. And it’s not just Germany. Last year, the top 20 utilities throughout Europe reported losing half of their value since 2008. According to the Swiss bank UBS, nine out of 10 European coal and gas plants are now losing money.

In the United States, where up to 49 percent of the new generating capacity came from renewables in 2012, 166 coal-fired electricity-generating plants have either closed or have announced they are closing in the past four and a half years. An additional 183 proposed new coal plants have been canceled since 2005.

To be sure, some of these closings have been due to the substitution of gas for coal, but the transition under way in both the American and global energy markets is far more significant than one fossil fuel replacing another. We are witnessing the beginning of a massive shift to a new energy-distribution model – from the “central station” utility-grid model that goes back to the 1880s to a “widely distributed” model with rooftop solar cells, on-site and grid battery storage, and microgrids.

The principal trade group representing U.S. electric utilities, the Edison Electric Institute, has identified distributed generation as the “largest near-term threat to the utility model.” Last May, Barclays downgraded the entirety of the U.S. electric sector, warning that “a confluence of declining cost trends in distributed solar­photovoltaic-power generation and residential­scale power storage is likely to disrupt the status quo” and make utility investments less attractive.

See the 10 Dumbest Things Said About Global Warming

This year, Citigroup reported that the widespread belief that natural gas – the supply of which has ballooned in the U.S. with the fracking of shale gas – will continue to be the chosen alternative to coal is mistaken, because it too will fall victim to the continuing decline in the cost of solar and wind electricity. Significantly, the cost of battery storage, long considered a barrier to the new electricity system, has also been declining steadily – even before the introduction of disruptive new battery technologies that are now in advanced development. Along with the impressive gains of clean-energy programs in the past decade, there have been similar improvements in our ability to do more with less. Since 1980, the U.S. has reduced total energy intensity by 49 percent.

It is worth remembering this key fact about the supply of the basic “fuel”: Enough raw energy reaches the Earth from the sun in one hour to equal all of the energy used by the entire world in a full year.

In poorer countries, where most of the world’s people live and most of the growth in energy use is occurring, photovoltaic electricity is not so much displacing carbon-based energy as leapfrogging it altogether. In his first days in office, the government of the newly elected prime minister of India, Narendra Modi (who has authored an e-book on global warming), announced a stunning plan to rely principally upon photovoltaic energy in providing electricity to 400 million Indians who currently do not have it. One of Modi’s supporters, S.L. Rao, the former utility regulator of India, added that the industry he once oversaw “has reached a stage where either we change the whole system quickly, or it will collapse.”

Nor is India an outlier. Neighboring Bangladesh is installing nearly two new rooftop PV systems every minute — making it the most rapidly growing market for PVs in the world. In West and East Africa, solar-electric cells are beginning what is widely predicted to be a period of explosive growth.

At the turn of the 21st century, some scoffed at projections that the world would be installing one gigawatt of new solar electricity per year by 2010. That goal was exceeded 17 times over; last year it was exceeded 39 times over; and this year the world is on pace to exceed that benchmark as much as 55 times over. In May, China announced that by 2017, it would have the capacity to generate 70 gigawatts of photovoltaic electricity. The state with by far the biggest amount of wind energy is Texas, not historically known for its progressive energy policies.

The cost of wind energy is also plummeting, having dropped 43 percent in the United States since 2009 – making it now cheaper than coal for new generating capacity. Though the downward cost curve is not quite as steep as that for solar, the projections in 2000 for annual worldwide wind deployments by the end of that decade were exceeded seven times over, and are now more than 10 times that figure. In the United States alone, nearly one-third of all new electricity-generating capacity in the past five years has come from wind, and installed wind capacity in the U.S. has increased more than fivefold since 2006.

For consumers, this good news may soon get even better. While the cost of carbon­based energy continues to increase, the cost of solar electricity has dropped by an average of 20 percent per year since 2010. Some energy economists, including those who produced an authoritative report this past spring for Bernstein Research, are now predicting energy-price deflation as soon as the next decade.

For those (including me) who are surprised at the speed with which this impending transition has been accelerating, there are precedents that help explain it. Remember the first mobile-telephone handsets? I do; as an inveterate “early adopter” of new technologies, I thought those first huge, clunky cellphones were fun to use and looked cool (they look silly now, of course). In 1980, a few years before I bought one of the early models, AT&T conducted a global market study and came to the conclusion that by the year 2000 there would be a market for 900,000 subscribers. They were not only wrong, they were way wrong: 109 million contracts were active in 2000. Barely a decade and a half later, there are 6.8 billion globally. 
These parallels have certainly caught the attention of the fossil-fuel industry and its investors: Eighteen months ago, the Edison Electric Institute described the floundering state of the once-proud landline-telephone companies as a grim predictor of what may soon be their fate.

 

The utilities are fighting back, of course, by using their wealth and the entrenched political power they have built up over the past century. In the United States, brothers Charles and David Koch, who run Koch Industries, the second-largest privately owned corporation in the U.S., have secretively donated at least $70 million to a number of opaque political organizations tasked with spreading disinformation about the climate crisis and intimidating political candidates who dare to support renewable energy or the pricing of carbon pollution.

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They regularly repeat shopworn complaints about the inadequate, intermittent and inconsistent subsidies that some governments have used in an effort to speed up the deployment of renewables, while ignoring the fact that global subsidies for carbon-based energy are 25 times larger than global subsidies for renewables.

One of the most effective of the groups financed by the Koch brothers and other carbon polluters is the American Legislative Exchange Council, or ALEC, which grooms conservative state legislators throughout the country to act as their agents in introducing legislation written by utilities and carbon-fuel lobbyists in a desperate effort to slow, if not stop, the transition to renewable energy.

The Kochs claim to act on principles of low taxation and minimal regulation, but in their attempts to choke the development of alternative energy, they have induced the recipients of their generous campaign contributions to contradict these supposedly bedrock values, pushing legislative and regulatory measures in 34 states to discourage solar, or encourage carbon energy, or both. The most controversial of their initiatives is focused on persuading state legislatures and public-utility commissions to tax homeowners who install a PV solar cell on their roofs, and to manipulate the byzantine utility laws and regulations to penalize renewable energy in a variety of novel schemes.

The chief battleground in this war between the energy systems of the past and future is our electrical grid. For more than a century, the grid – along with the regulatory and legal framework governing it – has been dominated by electric utilities and their centralized, fossil-fuel-powered­ electricity-generation plants. But the rise of distributed alternate energy sources allows consumers to participate in the production of electricity through a policy called net metering. In 43 states, homeowners who install solar PV to systems on their rooftops are permitted to sell electricity back into the grid when they generate more than they need.

These policies have been crucial to the growth of solar power. But net metering represents an existential threat to the future of electric utilities, the so-called utility death spiral: As more consumers install solar panels on their roofs, utilities will have to raise prices on their remaining customers to recover the lost revenues. Those higher rates will, in turn, drive more consumers to leave the utility system, and so on.

But here is more good news: The Koch brothers are losing rather badly. In Kansas, their home state, a poll by North Star Opinion Research reported that 91 percent of registered voters support solar and wind. Three-quarters supported stronger policy encouragement of renewable energy, even if such policies raised their electricity bills.

In Georgia, the Atlanta Tea Party joined forces with the Sierra Club to form a new organization called – wait for it – the Green Tea Coalition, which promptly defeated a Koch-funded scheme to tax rooftop solar panels.

Meanwhile, in Arizona, after the state’s largest utility, an ALEC member, asked the public-utility commission for a tax of up to $150 per month for solar households, the opposition was fierce and well-organized. A compromise was worked out – those households would be charged just $5 per month – but Barry Goldwater Jr., the leader of a newly formed organization called TUSK (Tell Utilities Solar won’t be Killed), is fighting a new attempt to discourage rooftop solar in Arizona. Characteristically, the Koch brothers and their allies have been using secretive and deceptive funding in Arizona to run television advertisements attacking “greedy” owners of rooftop solar panels – but their effort has thus far backfired, as local journalists have exposed the funding scam.

Even though the Koch-funded forces recently scored a partial (and almost certainly temporary) victory in Ohio, where the legislature voted to put a hold on the state’s renewable-portfolio standard and study the issue for two years, it’s clear that the attack on solar energy is too little, too late. Last year, the Edison Electric Institute warned the utility industry that it had waited too long to respond to the sharp cost declines and growing popularity of solar: “At the point when utility investors become focused on these new risks and start to witness significant customer- and earnings-erosion trends, they will respond to these challenges. But, by then, it may be too late to repair the utility business model.”

The most seductive argument deployed by the Koch brothers and their allies is that those who use rooftop solar electricity and benefit from the net-metering policies are “free riders” – that is, they are allegedly not paying their share of the maintenance costs for the infrastructure of the old utility model, including the grid itself. This deceptive message, especially when coupled with campaign contributions, has persuaded some legislators to support the proposed new taxes on solar panels.

But the argument ignores two important realities facing the electric utilities: First, most of the excess solar electricity is supplied by owners of solar cells during peak-load hours of the day, when the grid’s capacity is most stressed – thereby alleviating the pressure to add expensive new coal- or gas-fired generating capacity. But here’s the rub: What saves money for their customers cuts into the growth of their profits and depresses their stock prices. As is often the case, the real conflict is between the public interest and the special interest.

The second reality ignored by the Koch brothers is the one they least like to discuss, the one they spend so much money trying to obfuscate with their hired “merchants of doubt.” You want to talk about the uncompensated use of infrastructure? What about sewage infrastructure for 98 million tons per day of gaseous, heat-trapping waste that is daily released into our skies, threatening the future of human civilization? Is it acceptable to use the thin shell of atmosphere surrounding our planet as an open sewer? Free of charge? Really?

 

This, after all, is the reason the climate crisis has become an existential threat to the future of human civilization. Last April, the average CO2 concentrations in the Earth’s atmosphere exceeded 400 parts-per-million on a sustained basis for the first time in at least 800,000 years and probably for the first time in at least 4.5 million years (a period that was considerably warmer than at present).

According to a cautious analysis by the influential climate scientist James Hansen, the accumulated man-made global-warming pollution already built up in the Earth’s atmosphere now traps as much extra heat energy every day as would be released by the explosion of 400,000 Hiroshima-class nuclear bombs. It’s a big planet, but that’s a lot of energy.

And it is that heat energy that is giving the Earth a fever. Denialists hate the “fever” metaphor, but as the American Association for the Advancement of Science (AAAS) pointed out this year, “Just as a 1.4­degree-fever change would be seen as significant in a child’s body, a similar change in our Earth’s temperature is also a concern for human society.”

Thirteen of the 14 hottest years ever measured with instruments have occurred in this century. This is the 37th year in a row that has been hotter than the 20th-century average. April was the 350th month in a row hotter than the average in the preceding century. The past decade was by far the warmest decade ever measured.

Many scientists expect the coming year could break all of these records by a fair margin because of the extra boost from the anticipated El Niño now gathering in the waters of the eastern Pacific. (The effects of periodic El Niño events are likely to become stronger because of global warming, and this one is projected by many scientists to be stronger than average, perhaps on the scale of the epic El Niño of 1997 to 1998.)

The fast-growing number of extreme-weather events, connected to the climate crisis, has already had a powerful impact on public attitudes toward global warming. A clear majority of Americans now acknowledge thatman-made pollution is responsible. As the storms, floods, mudslides, droughts, fires and other catastrophes become ever more destructive, the arcane discussions over how much of their extra-destructive force should be attributed to global warming have become largely irrelevant. The public at large feels it viscerally now. As Bob Dylan sang, “You don’t need a weatherman to know which way the wind blows.”

Besides, there is a simple difference between linear cause and effect and systemic cause and effect. As one of the world’s most-respected atmospheric scientists, Kevin Trenberth, has said, “The environment in which all storms form has changed owing to human activities.”

For example, when Supertyphoon Haiyan crossed the Pacific toward the Philippines last fall, the storm gained strength across seas that were 5.4 degrees Fahrenheit warmer than they used to be because of greenhouse­gas pollution. As a result, Haiyan went from being merely strong to being the most powerful and destructive ocean-based storm on record to make landfall. Four million people were displaced (more than twice as many as by the Indian Ocean tsunami of 10 years ago), and there are still more than 2 million Haiyan refugees desperately trying to rebuild their lives.

When Superstorm Sandy traversed the areas of the Atlantic Ocean windward of New York and New Jersey in 2012, the water temperature was nine degrees Fahrenheit warmer than normal. The extra convection energy in those waters fed the storm and made the winds stronger than they would otherwise have been. Moreover, the sea level was higher than it used to be, elevated by the melting of ice in the frozen regions of the Earth and the expanded volume of warmer ocean waters.

Five years earlier, denialists accused me of demagogic exaggeration in an animated scene in my documentary An Inconvenient Truth that showed the waters of the Atlantic Ocean flooding into the 9/11 Ground Zero Memorial site. But in Sandy’s wake, the Atlantic did in fact flood Ground Zero – many years before scientists had expected that to occur.

Similarly, the inundation of Miami Beach by rising sea levels has now begun, and freshwater aquifers in low-lying areas from South Florida to the Nile Delta to Bangladesh to Indochina are being invaded by saltwater pushed upward by rising oceans. And of course, many low-lying islands – not least in the Bay of Bengal – are in danger of disappearing altogether. Where will the climate refugees go? Similarly, the continued melting of mountain glaciers and snowpacks is, according to the best scientists, already “affecting water supplies for as many as a billion people around the world.”

Just as the extreme-weather events we are now experiencing are exactly the kind that were predicted by scientists decades ago, the scientific community is now projecting far worse extreme-weather events in the years to come. Eighty percent of the warming in the past 150 years (since the burning of carbon-based fuels gained momentum) has occurred in the past few decades. And it is worth noting that the previous scientific projections consistently low-balled the extent of the global­warming consequences that later took place – for a variety of reasons rooted in the culture of science that favor conservative estimates of future effects.

In an effort to avoid these cultural biases, the AAAS noted this year that not only are the impacts of the climate crisis “very likely to become worse over the next 10 to 20 years and beyond,” but “there is a possibility that temperatures will rise much higher and impacts will be much worse than expected. Moreover, as global temperature rises, the risk increases that one or more important parts of the Earth’s climate system will experience changes that may be abrupt, unpredictable and potentially irreversible, causing large damages and high costs.”

Just weeks after that report, there was shock and, for some, a temptation to despair when the startling news was released in May by scientists at both NASA and the University of Washington that the long-feared “collapse” of a portion of the West Antarctic ice sheet is not only under way but is also now “irreversible.” Even as some labored to understand what the word “collapse” implied about the suddenness with which this catastrophe will ultimately unfold, it was the word “irreversible” that had a deeper impact on the collective psyche.

Just as scientists 200 years ago could not comprehend the idea that species had once lived on Earth and had subsequently become extinct, and just as some people still find it hard to accept the fact that human beings have become a sufficiently powerful force of nature to reshape the ecological system of our planet, many – including some who had long since accepted the truth about global warming – had difficulty coming to grips with the stark new reality that one of the long-feared “tipping points” had been crossed. And that, as a result, no matter what we do, sea levels will rise by at least an additional three feet.

The uncertainty about how long the process will take (some of the best ice scientists warn that a rise of 10 feet in this century cannot be ruled out) did not change the irreversibility of the forces that we have set in motion. But as Eric Rignot, the lead author of the NASA study, pointed out in The Guardian, it’s still imperative that we take action: “Controlling climate warming may ultimately make a difference not only about how fast West Antarctic ice will melt to sea, but also whether other parts of Antarctica will take their turn.”

The news about the irreversible collapse in West Antarctica caused some to almost forget that only two months earlier, a similar startling announcement had been made about the Greenland ice sheet. Scientists found that the northeastern part of Greenland – long thought to be resistant to melting – has in fact been losing more than 10 billion tons of ice per year for the past decade, making 100 percent of Greenland unstable and likely, as with West Antarctica, to contribute to significantly more sea-level rise than scientists had previously thought.

 

The heating of the oceans not only melts the ice and makes hurricanes, cyclones and typhoons more intense, it also evaporates around 2 trillion gallons of additional water vapor into the skies above the U.S. The warmer air holds more of this water vapor and carries it over the landmasses, where it is funneled into land-based storms that are releasing record downpours all over the world.

For example, an “April shower” came to Pensacola, Florida, this spring, but it was a freak – another rainstorm on steroids: two feet of rain in 26 hours. It broke all the records in the region, but as usual, virtually no media outlets made the connection to global warming. Similar “once in a thousand years” storms have been occurring regularly in recent years all over the world, including in my hometown of Nashville in May 2010.

All-time record flooding swamped large portions of England this winter, submerging thousands of homes for more than six weeks. Massive downpours hit Serbia and Bosnia this spring, causing flooding of “biblical proportions” (a phrase now used so frequently in the Western world that it has become almost a cliché) and thousands of landslides. Torrential rains in Afghanistan in April triggered mudslides that killed thousands of people – almost as many, according to relief organizations, as all of the Afghans killed in the war there the previous year.

In March, persistent rains triggered an unusually large mudslide in Oso, Washington, killing more than 40 people. There are literally hundreds of other examples of extreme rainfall occurring in recent years in the Americas, Europe, Asia, Africa and Oceania.

In the planet’s drier regions, the same extra heat trapped in the atmosphere by man-made global-warming pollution has also been driving faster evaporation of soil moisture and causing record-breaking droughts. As of this writing, 100 percent of California is in “severe,” “extreme” or “exceptional” drought. Record fires are ravaging the desiccated landscape. Experts now project that an increase of one degree Celsius over pre-industrial temperatures will lead to as much as a 600-­percent increase in the median area burned by forest fires in some areas of the American West – including large portions of Colorado. The National Research Council has reported that fire season is two and a half months longer than it was 30 years ago, and in California, firefighters are saying that the season is now effectively year-round.

Drought has been intensifying in many other dry regions around the world this year: Brazil, Indonesia, central and northwest Africa and Madagascar, central and western Europe, the Middle East up to the Caspian Sea and north of the Black Sea, Southeast Asia, Northeast Asia, Western Australia and New Zealand.

Syria is one of the countries that has been in the bull’s-eye of climate change. From 2006 to 2010, a historic drought destroyed 60 percent of the country’s farms and 80 percent of its livestock – driving a million refugees from rural agricultural areas into cities already crowded with the million refugees who had taken shelter there from the Iraq War. As early as 2008, U.S. State Department cables quoted Syrian government officials warning that the social and economic impacts of the drought are “beyond our capacity as a country to deal with.” Though the hellish and ongoing civil war in Syria has multiple causes – including the perfidy of the Assad government and the brutality on all sides – their climate-related drought may have been the biggest underlying trigger for the horror.

The U.S. military has taken notice of the strategic dangers inherent in the climate crisis. Last March, a Pentagon advisory committee described the climate crisis as a “catalyst for conflict” that may well cause failures of governance and societal collapse. “In the past, the thinking was that climate change multiplied the significance of a situation,” said retired Air Force Gen. Charles F. Wald. “Now we’re saying it’s going to be a direct cause of instability.”

Pentagon spokesman Mark Wright told the press, “For DOD, this is a mission reality, not a political debate. The scientific forecast is for more Arctic ice melt, more sea-level rise, more intense storms, more flooding from storm surge and more drought.” And in yet another forecast difficult for congressional climate denialists to rebut, climate experts advising the military have also warned that the world’s largest naval base, in Norfolk, Virginia, is likely to be inundated by rising sea levels in the future.

And how did the Republican-dominated House of Representatives respond to these grim warnings? By passing legislation seeking to prohibit the Department of Defense from taking any action to prepare for the effects of climate disruption.

There are so many knock-on consequences of the climate crisis that listing them can be depressing – diseases spreading, crop yields declining, more heat waves affecting vulnerable and elderly populations, the disappearance of summer-ice cover in the Arctic Ocean, the potential extinction of up to half of all the living species, and so much more. And that in itself is a growing problem too, because when you add it all up, it’s no wonder that many feel a new inclination to despair.

So, clearly, we will just have to gird ourselves for the difficult challenges ahead. There is indeed, literally, light at the end of the tunnel, but there is a tunnel, and we are well into it.

In November 1936, Winston Churchill stood before the United Kingdom’s House of Commons and placed a period at the end of the misguided debate over the nature of the “gathering storm” on the other side of the English Channel: “Owing to past neglect, in the face of the plainest warnings, we have entered upon a period of danger. . . . The era of procrastination, of half measures, of soothing and baffling expedience of delays is coming to its close. In its place, we are entering a period of consequences. . . . We cannot avoid this period; we are in it now.”

Our civilization is confronting this existential challenge at a moment in our historical development when our dominant global ideology – democratic capitalism – has been failing us in important respects.

Democracy is accepted in theory by more people than ever before as the best form of political organization, but it has been “hacked” by large corporations (defined as “persons” by the Supreme Court) and special interests corrupting the political system with obscene amounts of money (defined as “speech” by the same court).

Capitalism, for its part, is accepted by more people than ever before as a superior form of economic organization, but is – in its current form – failing to measure and include the categories of “value” that are most relevant to the solutions we need in order to respond to this threatening crisis (clean air and water, safe food, a benign climate balance, public goods like education and a greener infrastructure, etc.).

Pressure for meaningful reform in democratic capitalism is beginning to build powerfully. The progressive introduction of Internet-based communication – social media, blogs, digital journalism – is laying the foundation for the renewal of individual participation in democracy, and the re-elevation of reason over wealth and power as the basis for collective decision­making. And the growing levels of inequality worldwide, combined with growing structural unemployment and more frequent market disruptions (like the Great Recession), are building support for reforms in capitalism.

Both waves of reform are still at an early stage, but once again, Churchill’s words inspire: “If you’re going through hell, keep going.” And that is why it is all the more important to fully appreciate the incredible opportunity for salvation that is now within our grasp. As the satirical newspaper The Onion recently noted in one of its trademark headlines: “Scientists Politely Remind World That Clean Energy Technology Ready to Go Whenever.”

We have the policy tools that can dramatically accelerate the transition to clean energy that market forces will eventually produce at a slower pace. The most important has long since been identified: We have to put a price on carbon in our markets, and we need to eliminate the massive subsidies that fuel the profligate emissions of global-warming pollution.

We need to establish “green banks” that provide access to capital investment necessary to develop renewable energy, sustainable agriculture and forestry, an electrified transportation fleet, the retrofitting of buildings to reduce wasteful energy consumption, and the full integration of sustainability in the design and architecture of cities and towns. While the burning of fossil fuels is the largest cause of the climate crisis, deforestation and “factory farming” also play an important role. Financial and technological approaches to addressing these challenges are emerging, but we must continue to make progress in converting to sustainable forestry and agriculture.

In order to accomplish these policy shifts, we must not only put a price on carbon in markets, but also find a way to put a price on climate denial in our politics. We already know the reforms that are needed – and the political will to enact them is a renewable resource. Yet the necessary renewal can only come from an awakened citizenry empowered by a sense of urgency and emboldened with the courage to reject despair and become active. Most importantly, now is the time to support candidates who accept the reality of the climate crisis and are genuinely working hard to solve it – and to bluntly tell candidates who are not on board how much this issue matters to you. If you are willing to summon the resolve to communicate that blunt message forcefully – with dignity and absolute sincerity – you will be amazed at the political power an individual can still wield in America’s diminished democracy.

Something else is also new this summer. Three years ago, in these pages, I criticized the seeming diffidence of President Obama toward the great task of solving the climate crisis; this summer, it is abundantly evident that he has taken hold of the challenge with determination and seriousness of purpose.

He has empowered his Environmental Protection Agency to enforce limits on CO2 emissions for both new and, as of this June, existing sources of CO2. He has enforced bold new standards for the fuel economy of the U.S. transportation fleet. He has signaled that he is likely to reject the absurdly reckless Keystone XL-pipeline proposal for the transport of oil from carbon­intensive tar sands to be taken to market through the United States on its way to China, thus effectively limiting their exploitation. And he is even now preparing to impose new limits on the release of methane pollution.

All of these welcome steps forward have to be seen, of course, in the context of Obama’s continued advocacy of a so-called all-of-the-above energy policy – which is the prevailing code for aggressively pushing more drilling and fracking for oil and gas. And to put the good news in perspective, it is important to remember that U.S. emissions – after declining for five years during the slow recovery from the Great Recession – actually increased by 2.4 percent in 2013.

 

Nevertheless, the president is clearly changing his overall policy emphasis to make CO2 reductions a much higher priority now and has made a series of inspiring speeches about the challenges posed by climate change and the exciting opportunities available as we solve it. As a result, Obama will go to the United Nations this fall and to Paris at the end of 2015 with the credibility and moral authority that he lacked during the disastrous meeting in Copenhagen four and a half years ago.

The international treaty process has been so fraught with seemingly intractable disagreements that some parties have all but given up on the possibility of ever reaching a meaningful treaty.

Ultimately, there must be one if we are to succeed. And there are signs that a way forward may be opening up. In May, I attended a preparatory session in Abu Dhabi, UAE, organized by United Nations Secretary General Ban Ki-moon to bolster commitments from governments, businesses and nongovernmental organizations ahead of this September’s U.N. Climate Summit. The two-day meeting was different from many of the others I have attended. There were welcome changes in rhetoric, and it was clear that the reality of the climate crisis is now weighing on almost every nation. Moreover, there were encouraging reports from around the world that many of the policy changes necessary to solve the crisis are being adopted piecemeal by a growing number of regional, state and city governments.

For these and other reasons, I believe there is a realistic hope that momentum toward a global agreement will continue to build in September and carry through to the Paris negotiations in late 2015.

The American poet Wallace Stevens once wrote, “After the final ‘no’ there comes a ‘yes’/And on that ‘yes’ the future world depends.” There were many no’s before the emergence of a global consensus to abolish chattel slavery, before the consensus that women must have the right to vote, before the fever of the nuclear­arms race was broken, before the quickening global recognition of gay and lesbian equality, and indeed before every forward advance toward social progress. Though a great many obstacles remain in the path of this essential agreement, I am among the growing number of people who are allowing themselves to become more optimistic than ever that a bold and comprehensive pact may well emerge from the Paris negotiations late next year, which many regard as the last chance to avoid civilizational catastrophe while there is still time.

It will be essential for the United States and other major historical emitters to commit to strong action. The U.S. is, finally, now beginning to shift its stance. And the European Union has announced its commitment to achieve a 40-percent reduction in CO2 emissions by 2030. Some individual European nations are acting even more aggressively, including Finland’s pledge to reduce emissions 80 percent by 2050.

It will also be crucial for the larger developing and emerging nations – particularly China and India – to play a strong leadership role. Fortunately, there are encouraging signs. China’s new president, Xi Jinping, has launched a pilot cap-and-trade system in two cities and five provinces as a model for a nationwide cap-and-trade program in the next few years. He has banned all new coal burning in several cities and required the reporting of CO2 emissions by all major industrial sources. China and the U.S. have jointly reached an important agreement to limit another potent source of global-warming pollution – the chemical compounds known as hydro-fluorocarbons, or HFCs. And the new prime minister of India, as noted earlier, has launched the world’s most ambitious plan to accelerate the transition to solar electricity.

Underlying this new breaking of logjams in international politics, there are momentous changes in the marketplace that are exercising enormous influence on the perceptions by political leaders of the new possibilities for historic breakthroughs. More and more, investors are diversifying their portfolios to include significant investments in renewables. In June, Warren Buffett announced he was ready to double Berkshire Hathaway’s existing $15 billion investment in wind and solar energy.

A growing number of large investors – including pension funds, university endowments (Stanford announced its decision in May), family offices and others – have announced decisions to divest themselves from carbon­intensive assets. Activist and “impact” investors are pushing for divestment from carbon­rich assets and new investments in renewable and sustainable assets.

Several large banks and asset managers around the world (full disclosure: Generation Investment Management, which I co-founded with David Blood and for which I serve as chairman, is in this group) have advised their clients of the danger that carbon assets will become “stranded.” A “stranded asset” is one whose price is vulnerable to a sudden decline when markets belatedly recognize the truth about their underlying value – just as the infamous “subprime mortgages” suddenly lost their value in 2007 to 2008 once investors came to grips with the fact that the borrowers had absolutely no ability to pay off their mortgages.

Shareholder activists and public campaigners have pressed carbon-dependent corporations to deal with these growing concerns. But the biggest ones are still behaving as if they are in denial. In May 2013, ExxonMobil CEO Rex Tillerson responded to those pointing out the need to stop using the Earth’s atmosphere as a sewer by asking, “What good is it to save the planet if humanity suffers?”

I don’t even know where to start in responding to that statement, but here is a clue: Pope Francis said in May, “If we destroy creation, creation will destroy us. Never forget this.”

 

Exxonmobil, Shell and many other holders of carbon-intensive assets have argued, in essence, that they simply do not believe that elected national leaders around the world will ever reach an agreement to put a price on carbon pollution.

But a prospective global treaty (however likely or unlikely you think that might be) is only one of several routes to overturning the fossil-fuel economy. Rapid technological advances in renewable energy are stranding carbon investments; grassroots movements are building opposition to the holding of such assets; and new legal restrictions on collateral flows of pollution – like particulate air pollution in China and mercury pollution in the U.S. – are further reducing the value of coal, tar sands, and oil and gas assets.

In its series of reports to energy investors this spring, Citigroup questioned the feasibility of new coal plants not only in Europe and North America, but in China as well. Although there is clearly a political struggle under way in China between regional governments closely linked to carbon-­energy generators, suppliers and users and the central government in Beijing – which is under growing pressure from citizens angry about pollution – the nation’s new leadership appears to be determined to engineer a transition toward renewable energy. Only time will tell how successful they will be.

The stock exchanges in Johannesburg and São Paulo have decided to require the full integration of sustainability from all listed companies. Standard & Poor’s announced this spring that some nations vulnerable to the impacts of the climate crisis may soon have their bonds downgraded because of the enhanced risk to holders of those assets.

A growing number of businesses around the world are implementing sustainability plans, as more and more consumers demand a more responsible approach from businesses they patronize. Significantly, many have been pleasantly surprised to find that adopting efficient, low-carbon approaches can lead to major cost savings.

And all the while, the surprising and relentless ongoing decline in the cost of renewable energy and efficiency improvements are driving the transition to a low-carbon economy.

Is there enough time? Yes. Damage has been done, and the period of consequences will continue for some time to come, but there is still time to avoid the catastrophes that most threaten our future. Each of the trends described above – in technology, business, economics and politics – represents a break from the past. Taken together, they add up to genuine and realistic hope that we are finally putting ourselves on a path to solve the climate crisis.

How long will it take? When Martin Luther King Jr. was asked that question during some of the bleakest hours of the U.S. civil rights revolution, he responded, “How long? Not long. Because no lie can live forever. . . . How long? Not long. Because the arc of the moral universe is long, but it bends toward justice.”

And so it is today: How long? Not long.

This story is from the July 3rd-17th, 2014 issue of Rolling Stone.

http://www.rollingstone.com/politics/news/the-turning-point-new-hope-for-the-climate-20140618

Os limites das negociações do clima (Valor Econômico)

JC e-mail 4979, de 27 de junho de 2014

Artigo de Jeffrey D. Sachs publicado no Valor Econômico

Para o mundo vencer a crise decorrente das mudanças climáticas, precisaremos de uma nova abordagem. Atualmente, as maiores potências encaram o assunto como uma oportunidade para negociações sobre quem reduzirá suas emissões de CO2 (principalmente decorrentes do uso de carvão, petróleo e gás). Cada país aceita fazer pequenas “contribuições” para a redução das emissões, tentando induzir os outros países a fazer mais. Os EUA, por exemplo, vão “admitir” um pouco de redução de CO2 se a China fizer o mesmo.

Durante duas décadas ficamos presos a essa mentalidade minimalista e incremental, errônea em dois aspectos fundamentais. Em primeiro lugar, ela não está funcionando: as emissões de CO2 estão crescendo – e não caindo. A indústria petrolífera mundial está deitando e rolando – fracking, perfuração, exploração no Ártico, gaseificando carvão e construindo novas usinas produtoras de gás natural liquefeito (GNL). O mundo está aniquilando os sistemas de climatização e de produção de alimentos a um ritmo alucinante.

Em segundo lugar, a “descarbonização” do sistema energético é tecnologicamente complicada. O verdadeiro problema para os EUA não é a competição chinesa, é a complexidade de migrar uma economia que gera US$ 17,5 trilhões dos combustíveis fósseis para alternativas de baixo carbono. O problema da China não são os EUA, mas como eliminar a dependência da segunda maior economia do mundo do consumo arraigado de carvão. Na verdade, trata-se de problemas de engenharia, não de negociações.

A questão é como descarbonizar mantendo-se economicamente vigorosos. Negociadores envolvidos com a questão climática não podem dar respostas a essa questão, mas inovadores como Elon Musk, da Tesla, e cientistas como Klaus Lackner, da Universidade Columbia, podem.

A descarbonização do sistema energético mundial exige impedir que nossa vasta e crescente produção de eletricidade intensifique as emissões atmosféricas de CO2. Isso pressupõe também trocarmos nossas frotas de transporte por outras que não produzam carbono.

Gerar eletricidade com produção nula de carbono é factível. Energia de fontes solar e eólica já são capazes de proporcionar isso, mas não necessariamente quando e onde necessário. Necessitamos progressos em armazenamento para essas fontes de energia limpa.

Energia nuclear, outra fonte não geradora de carbono, também terá de desempenhar um grande papel no futuro, o que implica melhorar a confiança pública em sua segurança. Até mesmo os combustíveis fósseis podem produzir eletricidade sem liberação de carbono, se forem empregadas tecnologias para captura e armazenamento de carbono (CAC). Klaus Lackner é um líder mundial em pesquisa de novas estratégias de CAC.

A eletrificação dos transportes já foi viabilizada, e a Tesla, com os sofisticados veículos elétricos, está capturando a imaginação e o interesse do público. Elon Musk, ansioso por estimular o rápido desenvolvimento dos veículos, fez história, na semana passada, liberando as patentes de Tesla para uso por competidores.

Novas técnicas para projeto de edificações reduziram substancialmente os custos com aquecimento e refrigeração, ao basearem-se muito mais em isolamento, ventilação natural e energia solar.

O mundo precisa de um esforço concertado para adotar a geração de eletricidade com baixas emanações de carbono, e não mais negociações do tipo “nós contra eles”. Todos os países necessitam novas tecnologias de baixo carbono, muitas das quais ainda estão fora do alcance comercial. Negociadores de acordos climáticos devem, portanto, concentrar-se em como cooperar para assegurar que inovações tecnológicas sejam criadas e beneficiem todos os países.

Os países precisam inspirar-se em outros casos em que governos, cientistas e indústria uniram-se para produzir grandes mudanças. Por exemplo, o Projeto Manhattan (para produzir a bomba atômica, durante a Segunda Guerra Mundial) e ao assumir como objetivo realizar o primeiro pouso na Lua, o governo americano estabeleceu uma meta notável, um calendário ousado e alocou os recursos financeiros para concretizar os objetivos. Nos dois casos, cientistas e engenheiros cumpriram seus prazos.

Na realidade, processos de “mudança tecnológica direcionada”, em que objetivos são definidos ousadamente, etapas são identificadas e cronogramas são postos em prática, são muito mais comuns. A revolução em TI que nos deu computadores, smartphones, GPS e muito mais, foi construída sobre uma série de roteiros definidos pela indústria e por governos.

O genoma humano foi mapeado mediante esse tipo esforço governamental – que em última instância incorporou o setor privado. Mais recentemente, governo e indústria cooperaram para reduzir os custos do sequenciamento de um genoma individual – de cerca de US$ 100 milhões em 2001, para apenas US$ 1 mil, hoje. Uma meta de enorme redução de custos foi definida, os cientistas começaram a trabalhar e o progresso alvo foi alcançado dentro do cronograma.

Mas deixemos de fingir que trata-se de um jogo de pôquer, em vez de um quebra-cabeça científico e tecnológico da mais alta ordem. Precisamos de gente como Elon Musk e Klaus Lackner, precisamos da General Electric, Siemens, Ericsson, Intel, Electricité de France, Huawei, Google, Baidu, Samsung, Apple e outros em laboratórios, usinas de eletricidade e em cidades ao redor do mundo para forjar os avanços tecnológicos que reduzirão as emissões mundiais de CO2.

Há um lugar à mesa até mesmo para companhias como ExxonMobil, Chevron, BP, Peabody, Koch Industries e outras gigantes no setor do petróleo e carvão. Se desejam que seus produtos sejam usados no futuro, é melhor torná-los seguros mediante a implantação de tecnologias avançadas de CCS. A questão crucial é que a meta de profunda descarbonização é um trabalho para todos os interessados, entre eles o setor de combustíveis fósseis – e trata-se uma missão em que todos nós precisamos ficar no lado da sobrevivência e do bem-estar humanos. (Tradução de Sergio Blum)

Jeffrey D. Sachs é professor de economia e diretor do Instituto Terra, da Columbia University. É também assessor especial do secretário-geral das Nações Unidas no tema das Metas de Desenvolvimento do Milênio. Copyright: Project Syndicate, 2014.
http://www.project-syndicate.org

(Valor Econômico)
http://www.valor.com.br/opiniao/3595802/os-limites-das-negociacoes-do-clima#ixzz35qfSi4gm

The fight to reform Econ 101 (Al Jazeera)

Economics is a dismal nonscience, but it need not remain that way

July 16, 2014 6:00AM ET

by 

During the last weekend of June, hundreds of students, university lecturers, professors and interested members of the public descended on the halls of University College London to attend the Rethinking Economics conference. They all shared a similar belief: that economics education in most universities had become narrow, insular and detached from the real world.

For a brief period after the financial crisis of 2008, the shortcomings of the economics profession and the way it is taught were recognized. Many economists offered up mea culpas of various kinds and conceded that since they did not foresee the biggest economic event since the Great Depression, there was probably something seriously wrong with the discipline. But as time passed and many economies began to experience gradual, somewhat muted recoveries, the profession regained its confidence.

When I was completing my master’s degree at Kingston University last year, I experienced this firsthand from the more mainstream faculty there. Lecturers offered potted explanations of the crisis using old analytical tools such as supply and demand graphs that cannot incorporate expectations to explain asset price bubbles. The same economists who, just a few years ago, told us that financial markets were the conduits of perfect information began to introduce doublethink phrases in the media such as “rational bubble” (in which investors allegedly act irrationally by bidding up asset prices in full knowledge that prices are heavily inflated but think they can bail out of the market before prices fall) to explain the events of the past few years. There is nothing rational about investors’ acting this way, because they cannot know when the bubble will burst and so cannot time their exit from the market. They cannot know when the herd movement that they are part of will come to an end, so any action that they take to ride the wave will be just as irrational as those of people unaware of the bubble. The entire exercise appeared to be an ad hoc attempt to reinterpret the facts to fit the pet theory — economic agents aware of relevant information act rationally — rather than to alter the theory in light of the facts.

It was difficult not to sense the Soviet-style revisionism that had occurred within the halls of learning: The party had tossed history down the memory hole and introduced a strange, seemingly self-contradictory language that they were busy foisting upon an unwitting public. One Chicago school economist, Ray Ball, argues that the now notorious efficient market hypothesis (EMH), which states that financial markets price in all relevant information, is actually supported by the recent crisis. He argues that the capital flight that led to the bank meltdowns lends support to the EMH because it shows how rapidly financial markets react to new information. But as many will remember, investigations clearly showed that information was not being processed efficiently by market participants in the run-up to the crisis. The most colorful example of this was the Standard & Poor’s employee who, responding to a colleague who said that they should not be rating a mortgage-backed security deal because the estimations of risk were incorrect, said that cows could be estimating the risk of a product and S&P would still rate it.

Shine a light

Despite such attempts to shore up the orthodoxy, students have sensed that something is wrong: Over the past two years, they have been organizing across more than 60 countries with the aim of forcing the vampire that is the economics profession into the light of day. While the students in the movement have a diversity of opinions on various issues, they have all come to believe that the best way to reform economics is to demand that a plurality of approaches be taught. They have rightly identified the key fault with contemporary economics teaching: the monoculture it engenders. Currently only one approach to economics is taught in the vast majority of departments in the U.S. and Europe: what is usually called neoclassical or marginalist economics, epitomized by Harvard’s Gregory Mankiw — a former chairman of the Council of Economic Advisers under President George W. Bush — and Chicago’s Gary Becker, a Nobel laureate. This is the economics of the rational, atomized individual purged of all social context, whose only goal is to maximize a mysterious, effervescent quantity called utility. In this view, the economy tends toward an equilibrium end point, at which everyone has a job and wages and profits are set in line with what each individual contributes to society.

Donald Gillies, a former president of the British Society for the Philosophy of Science, told a stunned audience that he had examined three well-known Nobel Prize–winning papers in economics and could find nothing in them that he could call scientific.

When I spoke with the students, they were struck by how even those who dissented from contemporary economic policies like austerity shared this overarching vision. Paul Krugman, for example, to whom many turned after the crisis to provide context — including many of the students I met — also accepted the orthodox view (although he has not embraced some of the worst excesses echoed by his peers).

True dissenters

The students at the June conference also said that there were true dissenters in the discipline who found that economics was a highly contested field. Cambridge University’s Ha-Joon Chang pointed out that there are any number of schools of economic thought, each with their own approaches and insights. Their opinions range from the Austrians, who believe that government interference in the economy leads to wasted resources, to post-Keynesians, who believe that capitalist economies are inherently unstable and require government intervention to stave off collapse and stagnation, to Marxians, institutionalists, Schumpeterians, neo-Ricardians and so on. Chang argued that none of these schools of thought were inherently right or wrong; they all had insights into the working of the economy, and every one of them had a right to be taught to students as a competing point of view. It was up to the students, he said, to find what they found interesting, useful and credible.

One of the conference speakers pointed out that this is required in all the other disciplines that study people and society. He told an anecdote about being in the psychology department of his university when an inspector from a psychological association turned up to ensure that there was an adequately pluralist approach being undertaken. The speaker quipped that it would be far more likely that an inspector from an economics association would turn up to ensure that the current doctrine was being firmly adhered to.

But what, exactly, constitutes this dogmatic thinking? For starters, the firm belief that economics is a science on par with physics and chemistry. After all, these economists say, only a crank would demand that a plurality of approaches to physics and chemistry should be taught in universities. But the truth of the matter is that economics is not a science on par with physics and chemistry and it never will be. Donald Gillies, a former president of the British Society for the Philosophy of Science, told a stunned audience that he had examined three well-known Nobel Prize–winning papers in economics and could find nothing in them that he could call scientific. Rather, he said, they utilized sophisticated mathematics to hide the fact that they were not saying anything remotely relevant about the real world that could be proved or disproved.

The dirty little secret about economics is that it cannot, like other sciences, undertake proper laboratory experiments. Even the experiments of the behaviorist economists are open to doubt in that it seems unlikely that the manner in which people act in a lab while under observation is identical to how they act day to day. Economics is therefore ill equipped to make claims with the same confidence as bona fide sciences. What economists offer are instead interpretations of the world around them. Once this is understood, it becomes very difficult to argue against a plurality of opinions in the discipline. This was what the students sensed, and this is why their clarion call became one for pluralism.

New curriculum

These students are well organized, and their numbers are growing; their commitment is unlikely to go away anytime soon. They are focused in a manner that is impressive for a protest movement, willing to transcend their political differences in order to fight for a common goal. Every week a new group springs up. At the conference I attended, organizers went around with pads and pens collecting the contact details of sympathetic faculty members and other students in countries where the movement was only partially developed.

Even institutions are hopping on board. Many employers complain that the mainstream departments are churning out employees with mathematical skills completely out of proportion to the jobs they do but who seem unable to undertake basic economic analysis. Often these employees have to be retrained on the job in order to function at their institutions. The chief economist of the Bank of England, Andy Haldane, wrote in the foreword to the students’ international manifesto that “employers of economists, like the Bank of England, stand to benefit from such an evolution in the economics curriculum.” Given that mainstream economists often claim that the consumer is king and competition is sacrosanct, it is increasingly difficult to see how they make a case for their current monopoly over the educational process.

In September another conference will take place in New York, and rumor has it that an enormous international meeting will soon be organized too. If and when the movement reaches that level of international organization, it could start putting real pressure on companies, governments and economics departments to rethink their models and their ways. If the profession wishes to uphold what is left of its credibility, it would do well to pay attention.

Philip Pilkington is a London-based economist and member of the Political Economy Research Group at Kingston University. He runs the blog Fixing the Economists.

Miami, the great world city, is drowning while the powers that be look away (The Observer)

Low-lying south Florida, at the front line of climate change in the US, will be swallowed as sea levels rise. Astonishingly, the population is growing, house prices are rising and building goes on. The problem is the city is run by climate change deniers

, science editor, in Miami

The Observer, Friday 11 July 2014 08.59 BST

Miami coastline

The Miami coastline: there are fears that even a 30cm rise in the sea level could be catastrophic. Photograph: Joe Raedle/Getty

A drive through the sticky Florida heat into Alton Road in Miami Beach can be an unexpectedly awkward business. Most of the boulevard, which runs north through the heart of the resort’s most opulent palm-fringed real estate, has been reduced to a single lane that is hemmed in by bollards, road-closed signs, diggers, trucks, workmen, stacks of giant concrete cylinders and mounds of grey, foul-smelling earth.

It is an unedifying experience but an illuminating one – for this once glamorous thoroughfare, a few blocks from Miami Beach’s art deco waterfront and its white beaches, has taken on an unexpected role. It now lies on the front line of America’s battle against climate change and the rise in sea levels that it has triggered.

“Climate change is no longer viewed as a future threat round here,” says atmosphere expert Professor Ben Kirtman, of the University of Miami. “It is something that we are having to deal with today.”

Every year, with the coming of high spring and autumn tides, the sea surges up the Florida coast and hits the west side of Miami Beach, which lies on a long, thin island that runs north and south across the water from the city of Miami. The problem is particularly severe in autumn when winds often reach hurricane levels. Tidal surges are turned into walls of seawater that batter Miami Beach’s west coast and sweep into the resort’s storm drains, reversing the flow of water that normally comes down from the streets above. Instead seawater floods up into the gutters of Alton Road, the first main thoroughfare on the western side of Miami Beach, and pours into the street. Then the water surges across the rest of the island.

The effect is calamitous. Shops and houses are inundated; city life is paralysed; cars are ruined by the corrosive seawater that immerses them. During one recent high spring tide, laundromat owner Eliseo Toussaint watched as slimy green saltwater bubbled up from the gutters. It rapidly filled the street and then blocked his front door. “This never used to happen,” Toussaint told reporters. “I’ve owned this place eight years and now it’s all the time.”

Today, shop owners keep plastic bags and rubber bands handy to wrap around their feet when they have to get to their cars through rising waters, while householders have found that ground-floor spaces in garages are no longer safe to keep their cars. Only those on higher floors can hope to protect their cars from surging sea waters that corrode and rot the innards of their vehicles.

Hence the construction work at Alton Road, where $400m is now being spent in an attempt to halt these devastating floods – by improving Miami Beach’s stricken system of drains and sewers. In total, around $1.5bn is to be invested in projects aimed at holding back the rising waters. Few scientists believe the works will have a long-term effect.

lowlying houses miami

Low-lying houses in Miami Beach are especially vulnerable. Photograph: Joe Raedle/Getty Images

“There has been a rise of about 10 inches in sea levels since the 19th century – brought about by humanity’s heating of the planet through its industrial practices – and that is now bringing chaos to Miami Beach by regularly flooding places like Alton Road,” says Harold Wanless, a geology professor at the University of Miami. “And it is going to get worse. By the end of this century we could easily have a rise of six feet, possibly 10 feet. Nothing much will survive that. Most of the land here is less than 10 feet above sea level.”

What makes Miami exceptionally vulnerable to climate change is its unique geology. The city – and its satellite towns and resorts – is built on a dome of porous limestone which is soaking up the rising seawater, slowly filling up the city’s foundations and then bubbling up through drains and pipes. Sewage is being forced upwards and fresh water polluted. Miami’s low topography only adds to these problems. There is little land out here that rises more than six feet above sea level. Many condos and apartment blocks open straight on the edge of the sea. Of the total of 4.2 million US citizens who live at an elevation of four feet or less, 2.4 million of them live in south Florida.

At Florida International University, geologist Peter Harlem has created a series of maps that chart what will happen as the sea continues to rise. These show that by the time oceans have risen by four feet – a fairly conservative forecast – most of Miami Beach, Key Biscayne, Virginia Key and all the area’s other pieces of prime real estate, will be bathtubs. At six feet, Miami city’s waterfront and the Florida Keys will have disappeared. The world’s busiest cruise ship port, which handles four million passengers, will disappear beneath the waves. “This is the fact of life about the ocean: it is very, very powerful,” says Harlem.

Miami and its surroundings are facing a calamity worthy of the Old Testament. It is an astonishing story. Despite its vast wealth, the city might soon be consumed by the waves, for even if all emissions of carbon dioxide were halted tomorrow – a very unlikely event given their consistent rise over the decades – there is probably enough of the gas in the atmosphere to continue to warm our planet, heat and expand our seas, and melt polar ice. In short, there seems there is nothing that can stop the waters washing over Miami completely.

It a devastating scenario. But what really surprises visitors and observers is the city’s response, or to be more accurate, its almost total lack of reaction. The local population is steadily increasing; land prices continue to surge; and building is progressing at a generous pace. During my visit last month, signs of construction – new shopping malls, cranes towering over new condominiums and scaffolding enclosing freshly built apartment blocks – could be seen across the city, its backers apparently oblivious of scientists’ warnings that the foundations of their buildings may be awash very soon.

Activists Demonstrate Against Sen. Rubio's Miami Office

Protesters gather near the office of Senator Marco Rubio to ask him to take action to address climate change. Photograph: Joe Raedle/Getty Images

Not that they are alone. Most of Florida’s senior politicians – in particular, Senator Marco Rubio, former governor Jeb Bush and current governor Rick Scott, all Republican climate-change deniers – have refused to act or respond to warnings of people like Wanless or Harlem or to give media interviews to explain their stance, though Rubio, a Republican party star and a possible 2016 presidential contender, has made his views clear in speeches. “I do not believe that human activity is causing these dramatic changes to our climate the way these scientists are portraying it. I do not believe that the laws that they propose we pass will do anything about it, except it will destroy our economy,” he said recently. Miami is in denial in every sense, it would seem. Or as Wanless puts it: “People are simply sticking their heads in the sand. It is mind-boggling.”

Not surprisingly, Rubio’s insistence that his state is no danger from climate change has brought him into conflict with local people. Philip Stoddard, the mayor of South Miami, has a particularly succinct view of the man and his stance. “Rubio is an idiot,” says Stoddard. “He says he is not a scientist so he doesn’t have a view about climate change and sea-level rise and so won’t do anything about it. Yet Florida’s other senator, Democrat Bill Nelson, is holding field hearings where scientists can tell people what the data means. Unfortunately, not enough people follow his example. And all the time, the waters are rising.”

Philip Stoddard is particularly well-placed to judge what is happening to Miami. Tall, thin, with a dry sense of humour, he is a politician, having won two successive elections to be mayor of South Miami, and a scientist, a biology professor at Florida International University. The backyard of the home that he shares with his architect wife, Grey Reid, reflects his passion for the living world. While most other South Miami residences sport bright blue swimming pools and barbecues, Stoddard has created a small lake, fringed with palms and ferns, that would do justice to the swampy Everglades near his home. Bass, koi and mosquito fish swim here, while bright dragonflies and zebra lapwing butterflies flit overhead. It is a naturalists’ haven but Stoddard is under no illusions about the risks facing his home. Although several miles inland, the house is certainly not immune to the changes that threaten to engulf south Florida.

“The thing about Miami is that when it goes, it will all be gone,” says Stoddard. “I used to work at Cornell University and every morning, when I went to work, I climbed more elevation than exists in the entire state of Florida. Our living-room floor here in south Miami is at an elevation of 10 feet above sea level at present. There are significant parts of south Florida that are less than six feet above sea level and which are now under serious threat of inundation.”

Nor will south Florida have to wait that long for the devastation to come. Long before the seas have risen a further three or four feet, there will be irreversible breakdowns in society, he says. “Another foot of sea-level rise will be enough to bring salt water into our fresh water supplies and our sewage system. Those services will be lost when that happens,” says Stoddard.

“You won’t be able to flush away your sewage and taps will no longer provide homes with fresh water. Then you will find you will no longer be able to get flood insurance for your home. Land and property values will plummet and people will start to leave. Places like South Miami will no longer be able to raise enough taxes to run our neighbourhoods. Where will we find the money to fund police to protect us or fire services to tackle house fires? Will there even be enough water pressure for their fire hoses? It takes us into all sorts of post-apocalyptic scenarios. And that is only with a one-foot sea-level rise. It makes one thing clear though: mayhem is coming.”

Miami flooding

In November 2013, a full moon and high tides led to flooding in parts of the city, including here at Alton Road and 10th Street. Photograph: Corbis

And then there is the issue of Turkey Point nuclear plant, which lies 24 miles south of Miami. Its operators insist it can survive sea surges and hurricanes and point out that its reactor vessel has been built 20 feet above sea level. But critics who include Stoddard, Harlem and others argue that anciliary equipment – including emergency diesel generators that are crucial to keeping cooling waters circulating in the event of power failure – are not so well protected. In the event of sea rise and a major storm surge, a power supply disruption could cause a repeat of the Fukushima accident of 2011, they claim. In addition, inundation maps like those prepared by Harlem show that with a three-foot sea-level rise, Turkey Point will be cut off from the mainland and will become accessible only by boat or aircraft. And the higher the seas go, the deeper it will be submerged.

Turkey Point was built in the 1970s when sea level rises were not an issue, of course. But for scientists like Ben Kirtman, they are now a fact of life. The problem is that many planners and managers still do not take the threat into account when planning for the future, he argues. A classic example is provided by the state’s water management. South Florida, because it is so low-lying, is criss-crossed with canals that take away water when there is heavy rainfall and let it pour into the sea.

“But if you have sea level rises of much more than a foot in the near future, when you raise the canal gates to let the rain water out, you will find sea water rushing in instead,” Kirtman said. “The answer is to install massive pumps as they have done in New Orleans. Admittedly, these are expensive. They each cost millions of dollars. But we are going to need them and if we don’t act now we are going to get caught out. The trouble is that no one is thinking about climate change or sea-level rises at a senior management level.”

The problem stems from the top, Kirtman said, from the absolute insistence of influential climate change deniers that global warming is not happening. “When statesmen like Rubio say things like that, they make it very, very hard for anything to get done on a local level – for instance for Miami to raise the millions it needs to build new sewers and canals. If local people have been told by their leaders that global warming is not happening, they will simply assume you are wasting their money by building defences against it.

“But global warming is occurring. That is absolutely unequivocal. Since the 1950s, the climate system has warmed. That is an absolute fact. And we are now 95% sure that that warming is due to human activities. If I was 95% sure that my house was on fire, would I get out? Obviously I would. It is straightforward.”

This point is backed by Harold Wanless. “Every day we continue to pump uncontrolled amounts of greenhouse gas into the atmosphere, we strengthen the monster that is going to consume us. We are heating up the atmosphere and then we are heating up the oceans so that they expand and rise. There doesn’t look as if anything is going to stop that. People are starting to plan in Miami but really they just don’t see where it is all going.”

Thus one of the great cities of the world faces obliteration in the coming decades. “It is over for south Florida. It is as simple as that. Nor is it on its own,” Wanless admits.

“The next two or three feet of sea-level rise that we get will do away with just about every barrier island we have across the planet. Then, when rises get to four-to-six feet, all the world’s great river deltas will disappear and with them the great stretches of agricultural land that surrounds them. People still have their heads in the sand about this but it is coming. Miami is just the start. It is worth watching just for that reason alone. It is a major US city and it is going to let itself drown.”

Other areas at risk

London

With eight power stations, 35 tube stations and all of Whitehall in the tidal Thames floodplain, the threat of floods has long loomed large, posing a risk to the economy, infrastructure and national heritage. With sea level rises and increased rainfall on the cards thanks to climate change, measures are being put in place to revamp and boost the ageing flood defences. Meanwhile, the south-east of England is sinking by around 1.5mm a year.

Amsterdam/Netherlands

The Dutch are often looked to as the masters of flood defence engineering with their impressive array of dams, dikes and barriers. It’s a skill they have had to acquire as almost half the population lives less than 3ft above sea level and many livelihoods depend on the country’s strong flood defences. They have adopted a “live with water, rather than fight it” attitude in recent years, with innovations including “floating homes” being built in Amsterdam.

New Orleans

Bearing in mind that roughly half of New Orleans is below sea level, its future in terms of coastal flooding does not look too bright. Indeed, according to the World Bank it is the fourth-most vulnerable city to future sea level rise in economic costs, with predicted average annual losses of $1.8bn in 2050. It is predicted that rising waters and subsiding land could result in relative sea level rises of up to 4.6ft by 2100, one of the highest rates in the US.

Maldives

The Maldives is generally thought of as an island paradise but is critically endangered by the rising ocean that both supports and surrounds it. Of its 1,192 islands, 80% are less than 3ft above sea level, with global warming putting the Maldives at risk of becoming the Atlantis of our time. So perhaps it is unsurprising that the Maldivian president is looking at the options of buying land should the country’s 200 densely inhabited islands need to be evacuated.There’s even a pot of money especially allocated for buying land overseas and moving the islands’s residents to safer ground.

Bangladesh

Bangladesh is a nation in which three majestic Himalayan rivers converge, before meandering their way to the sea via the Ganges delta: beautiful on a map, but not ideal in terms of river flooding, or tidal flooding for that matter. The country is basically a massive floodplain, with more than 20% of its land awash with water every year and around 70% experiencing severe flooding in extreme cases. As one of the world’s least developed countries, it cannot afford the technology others use to mitigate the effects of flooding and has to turn to more imaginative means, such as creating houses built on stilts in coastal areas.

Abigail Hayward

Mudança climática ameaça estabilidade econômica de cidades (CarbonoBrasil)

11/7/2014 – 11h48

por Jéssica Lipinski, do CarbonoBrasil

bhcdp Mudança climática ameaça estabilidade econômica de cidades

Novo relatório mostra que 76% dos 207 municípios analisados creem que as alterações ambientais trazem riscos físicos a seus habitantes e empresas; documento identificou 757 atividades de adaptação e mitigação nas cidades avaliadas

Uma nova pesquisa do Carbon Diclosure Project (CDP), organização sem fins lucrativos que ajuda cidades e empresas e medirem, divulgarem, gerirem e compartilharem informações ambientais, revelou que os governos locais das principais cidades do mundo estão avançando com as ações para combater as mudanças climáticas, já que acreditam que o fenômeno coloca em perigo a estabilidade de suas economias.

O relatório, intitulado Protecting our Capital (Protegendo nosso Capital ou Protegendo nossa Capital),aponta que 76% dos 207 municípios analisados acreditam que os efeitos das mudanças climáticas possam trazer algum tipo de risco físico a seus habitantes e companhias.

Entre as cidades avaliadas pelo estudo estão Caracas (Venezuela), Hong Kong, Johanesburgo (África do Sul), Londres (Inglaterra), Nova Iorque (Estados Unidos), São Paulo, Tóquio (Japão), Wellington (Nova Zelândia) e Sidney (Austrália).

Alguns dos principais riscos identificados pelas cidades são: danos materiais e a bens de capital; destruição de meios de transporte e infraestrutura; e problemas relacionados ao bem-estar dos cidadãos.

“Os governos locais estão agindo à frente para protegerem seus cidadãos e empresas dos impactos das mudanças climáticas, porém é preciso mais colaboração com as empresas para aumentar a resiliência urbana. Através do fornecimento de informação, políticas e incentivos, as cidades podem ajudar a equipar as empresas para gerirem esses riscos e abraçarem as oportunidades”, observou Larissa Bulla, diretora do programa de cidades do CDP.

Na verdade, segundo o documento, os municípios estão muito alinhados com as companhias quando o assunto é identificação de riscos. Eles reconhecem 69% dos riscos físicos das mudanças climáticas que as empresas identificam nessas cidades, e estão procurando resolver cerca de 66% dos identificados pelas corporações.

Por exemplo, a cidade de Caracas relata: “a água potável e a geração de eletricidade podem ser interrompidas por causa das mudanças climáticas. Esses fatores podem afetar o setor privado. As enchentes podem interromper as operações e as companhias de seguros podem enfrentar reivindicações mais elevadas”.

Tal situação também ocorre no município de Pittsburgh, nos EUA, em que alguns proprietários de empresas estão abandonando seus investimentos porque não são mais capazes de buscar compensação pelas perdas ocorridas como resultado das mudanças climáticas. Tanto é que a indústria local de seguros recentemente apresentou ações contra as cidades devido ao fato de que elas não estavam buscando se adaptar às consequências das mudanças climáticas.

Felizmente, a situação crítica parece estar levando a mais ação por parte dos municípios e também das empresas. No total, o CDP identificou 757 atividades de adaptação aos efeitos das mudanças climáticas nas cidades avaliadas, como o reporte e redução de emissões de gases do efeito estufa (GEEs). O documento também aponta que 102 dos 207 municípios já têm planos de adaptação em vigor.

É o caso de Hong Kong, cuja fornecedora de energia CLP Holdings sofreu danos locais e interrupção das atividades como resultado do aumento do nível do mar. A empresa gastou US$ 193 mil elevando os níveis dos pisos de suas edificações, e investiu mais US$ 516 mil para aumentar a capacidade de drenagem.

Enquanto isso, o Departamento de Serviços de Drenagem de Hong Kong direcionou US$ 2,7 bilhões para infraestrutura contra enchentes, incluindo o alargamento de rios e o armazenamento subterrâneo de água.

Em Londres, para combater o aumento das temperaturas, a assessoria financeira Morgan Stanley gastou US$ 4,4 milhões aprimorando o sistema de condicionadores de ar em seu centro de dados. Além disso, a cidade está usando seu sistema de planejamento para uma maior eficiência nos sistemas energético e de resfriamento, garantindo mais contribuição para uma cidade mais resiliente.

spriscos 1 Mudança climática ameaça estabilidade econômica de cidadesDe acordo com o relatório, no Brasil também há bons exemplos de ações climáticas. Em Campinas, no estado de São Paulo, a indústria alimentícia e de bebidas exportou bens no valor de US$ 11 bilhões em 2013, mas a cidade informa que “as indústrias que exigem uso intenso de água, como as companhias de refrigerante, podem escolher outra região devido à escassez de água no estado de São Paulo”.

Por isso, algumas cidades do estado, como a capital e o município de Caieiras, estão desenvolvendo planos de adaptação climática. Caieiras criou uma parceria com o governo nacional em um projeto de US$ 5,3 milhões para aumentar a capacidade de fluxo do rio Juquery, que é responsável pelas enchentes locais, diminuindo o risco e intensidade das inundações.

Já o município de São Paulo está investindo US$ 22 bilhões para melhorar sua infraestrutura de transporte. Tal investimento tem o potencial de criar melhores condições para as empresas operarem, tais como aumentar a mobilidade dos funcionários e clientes, e gerar um movimento mais eficiente de insumos e produtos.

A cidade também está colaborando com grandes companhias para melhorar sua infraestrutura hídrica.A Sabesp, maior companhia de água do país, fez uma parceria com a capital paulista para criar o Programa Vida Nova, que investiu US$ 600 milhões em coordenação com o programa de urbanização de favelas da cidade para fornecer redes de esgoto para 43 favelas e regiões de pouco desenvolvimento na cidade.

“A colaboração entre as cidades e as empresas é essencial para reduzir os impactos às populações mais vulneráveis”, afirma o relatório.

“Três quartos das cidades que fizeram parte do programa de cidades do CDP neste ano identificaram benefícios substanciais que fluem para economias públicas e privadas a partir de iniciativas de adaptação climáticas. Esses benefícios podem ser ampliados através de colaborações mais estreitas e do compartilhamento de conhecimento e recursos técnicos” concluiu Gary Lawrence, diretor de sustentabilidade da firma de serviços de suporte e infraestrutura AECOM.

* Publicado originalmente no site CarbonoBrasil.

(CarbonoBrasil)

Negócio arriscado (Folha de São Paulo)

JC e-mail 4987, de 11 de julho de 2014

Em editorial, a Folha de São Paulo faz uma leitura sobre as mudanças climáticas no Planeta

O ano de 2015 poderá assistir a uma mudança de sinal na questão da mudança climática planetária. Há indícios de que ela já deixa o terreno estéril das polêmicas ao estilo Fla-Flu para se tornar, cada vez mais, uma preocupação crescente entre empresários e governantes de todos os matizes.

Não têm faltado manifestações nesse sentido. Elas aparecem bem sumarizadas na entrevista de Achim Steiner, diretor-executivo do Programa das Nações Unidas para o Meio Ambiente (Pnuma) ao jornal “Valor Econômico”.

Steiner aposta num bom acordo internacional em Paris, no final de 2015, decisiva reunião de cúpula sobre o clima. Um tratado abrangente e ambicioso reverteria o fiasco de Copenhague (2009), que deveria ter produzido um documento para substituir o Protocolo de Kyoto (1997), extinto em 2012.

Para o diretor do Pnuma, a poluição do carbono –que agrava o efeito estufa e leva ao aquecimento global– não é o preço inevitável do desenvolvimento. Seus argumentos são essencialmente econômicos, e não ideológicos.

Ele aponta a distorção dos subsídios concedidos mundialmente aos combustíveis fósseis (carvão, petróleo e gás natural), principal fonte do carbono lançado na atmosfera por atividades humanas. A conta fica entre US$ 600 bilhões e US$ 700 bilhões anuais e correspondente a cerca de dez vezes os incentivos para energias renováveis, como a eólica (ventos).

Seu exemplo é o Quênia, país que planeja incluir em cinco anos os 75% da população hoje sem acesso à eletricidade –e o fará com 95% de fontes limpas. Poderia ter citado o Brasil, que tem 80% de sua matriz com geração renovável e, nos últimos anos, descobriu os atrativos da energia eólica.

E Achim Steiner não está só. No contexto da opinião pública dos EUA, talvez a mais refratária ao tema do aquecimento global, líderes da política e da economia –democratas e republicanos– também vieram a público para defender que a inação diante dos problemas do clima, hoje, custará caro no futuro cada vez menos distante.

A manifestação apareceu no relatório “Risky Business” (negócio arriscado), com o endosso de pesos pesados como os ex-secretários do Tesouro dos EUA Henry Paulson, Robert Rubin e George Shultz, além de Michael Bloomberg, ex-prefeito de Nova York.

Seu raciocínio é cristalino: por remoto que seja o perigo, faz-se seguro contra incêndio; que sentido haveria, então, em ignorar os riscos do aquecimento global? A resposta será dada, ou não, em Paris.

(Folha de São Paulo)
http://www1.folha.uol.com.br/fsp/opiniao/175354-negocio-arriscado.shtml

Climate change: IPCC must consider alternate policy views, researchers say (Science Daily)

Date: July 7, 2014

Source: Princeton University, Woodrow Wilson School of Public and International Affairs

Summary: The Summary for Policymakers recently produced by the Intergovernmental Panel on Climate Change has triggered a public debate about excessive governmental intrusion in the IPCC process. The IPCC cannot avoid alternative political interpretations of data and must involve policy makers in finding out how to address these implications, according to a team of researchers.

 In addition to providing regular assessments of scientific literature, the Intergovernmental Panel on Climate Change Process (IPCC) also produces a “Summary for Policymakers” intended to highlight relevant policy issues through data.

While the summary presents powerful scientific evidence, it goes through an approval process in which governments can question wording and the selection of findings but not alter scientific facts or introduce statements at odds with the science. In particular, during this process, the most recent summary on mitigation policies was stripped of several important figures and paragraphs that were in the scientists’ draft, leading some IPCC scientists to express concerns about excessive political intrusion.

Delicate issues of political interpretation cannot be avoided, wrote three IPCC authors in the journalScience. In their analysis, the team — which includes Marc Fleurbaey from Princeton University’s Woodrow Wilson School of Public and International Affairs — uses global emissions data to show how multiple political interpretations can be made from the same dataset. They argue that the IPCC should consider a writing process that better connects scientific findings with multiple political outcomes.

“The IPCC should consider opening up more channels for dialogue in which salient political discussions are connected to relevant scientific material,” said the article’s co-author Marc Fleurbaey, the Robert E. Kuenne Professor in Economics, Humanistic Studies and Public Affairs. “Such a collaboration or coproduction is what lends the IPCC its credibility as the voice of scientists — but with more weight for policy.”

While the IPCC undoubtedly produces the most up-to-date, comprehensive scientific reports on climate change, its approval process has become tediously extensive. As the panel embarks upon its sixth assessment, those involved have been working toward streamlining the process.

In their review, Fleurbaey and his co-authors — Navroz Dubash from the Centre for Policy Research in India and Sivan Kartha from the Stockholm Environment Institute — write that this approval process sets the IPCC apart from other technical reports. Instead of changing the approval process, they suggest an alternate vision for articulating science and policy at the IPCC.

To illustrate their vision, the researchers analyzed global emissions by reviewing income growth across countries, a key driver of emissions growth. When looking at income, countries are sometimes grouped into such categories as lower-income, lower-middle income, upper-middle income and high-income. The trouble, however, is that some countries are rapidly changing in terms of income, which elides relevant information. Likewise, a few big countries can dominate the statistics, and the time reference used for grouping them also can lead to large differences.

When global emissions are analyzed according to groupings based on current income figures, upper-middle income countries account for 75 percent of the rise in global emissions from 2000 to 2010. This presentation of data was deleted from the recent summary report. A political interpretation of this, Fleurbaey and his collaborators write, may be that country groupings should reflect the increasing role of upper-middle income countries and perhaps impose commensurate emission limits.

However, when grouping countries according to their income in the middle of the decade (2005), global emissions rose three quarters in lower-middle income countries, a change due in part to the fact that China joined the upper-middle income group in 2010 only. This presentation highlighting lower-middle income countries may suggest supporting these countries financially and technologically in developing lower carbon economies.

“As you can see, both representations would be equally faithful to the underlying data, but they are also equally synthetic and incomplete, and they differ markedly in their political extrapolations,” said Fleurbaey. “It’s hard to accurately group these countries without imposing political perceptions, and analysis by country groups is highly sensitive in the current context of the renegotiation of the groups defined in the Kyoto protocol.”

As an illustration that more positive outcomes can be obtained from governmental dealings, the authors report that some sections benefited from the approval process, as they were eventually expanded and clarified by additional explanations. For example, the framing section of the summary, which was taken up for discussion early in the approval process, achieved a smooth convergence between the authors and country delegates.

On the flip side, the international cooperation section was much shortened, simplified and seemingly stripped of controversy. This section had much less time allowed for discussion and was examined in a contentious atmosphere after the removal of several figures involving country groupings.

Fellow IPCC author Michael Oppenheimer, the Albert G. Milbank Professor of Geosciences and International Affairs in the Woodrow Wilson School and Department of Geosciences, who was not an author of the Science article, fully supported its position.

“IPCC, and attempts to solve the climate problem, would benefit immensely from a strengthening of the science-policy interface,” Oppenheimer said. “Proposals to completely separate the science and policy functions are simply wrong-headed and self-defeating. This collaboration is what makes IPCC unique and uniquely effective”

“Seemingly technical choices can crystallize into value-laden political conclusions, particularly given tight word and time limits,” said Fleurbaey. “It is more productive for authors to be aware of the varying political implications and factor these into their representations of data.”

Journal Reference:
  1. N. K. Dubash, M. Fleurbaey, S. Kartha. Political implications of data presentation. Science, 2014; 345 (6192): 36 DOI: 10.1126/science.1255734

Os céticos estão perdendo espaço (Valor Econômico)

JC e-mail 4985, de 09 de julho de 2014

Artigo de Martin Wolf publicado no Valor Econômico

Não temos uma atmosfera chinesa ou americana. Temos uma atmosfera planetária. Não podemos fazer experimentos independentes com ela. Mas temos feito um experimento conjunto. Não foi uma decisão consciente: ocorreu em consequência da Revolução Industrial. Mas estamos decidindo conscientemente não suspendê-lo.

Realizar experimentos irreversíveis com o único planeta que temos é irresponsável. Só seria racional se recusar a fazer alguma coisa para mitigar os riscos se tivéssemos certeza de que a ciência da mudança climática provocada pelo homem é um embuste.

Qualquer leitor razoavelmente aberto a novas ideias do “Summary for Policymakers” do Painel Intergovernamental sobre Mudança Climática chegaria à conclusão que qualquer certeza desse tipo sobre a ciência seria absurda. É racional perguntar se os benefícios da mitigação superam os custos. É irracional negar que é plausível a mudança climática provocada pelo homem.

Nessas discussões e, aliás, na política climática, os Estados Unidos desempenham papel central, por quatro motivos. Em primeiro lugar, os EUA ainda são o segundo maior emissor mundial de dióxido de carbono, embora sua participação de 14% do total mundial em 2012 o situe bem atrás dos 27% da China. Em segundo lugar, as emissões americanas per capita correspondem aproximadamente ao dobro das emissões das principais economias da Europa ocidental ou do Japão. Seria impossível convencer as economias emergentes a reduzir as emissões se os EUA não aderissem. Em terceiro lugar, os EUA dispõem de recursos científicos e tecnológicos insuperáveis, que serão necessários para que o mundo possa enfrentar o desafio de associar baixas emissões à prosperidade para todos. Finalmente, os EUA abrigam o maior número de opositores ativistas apaixonados e engajados.

Diante desse quadro, dois acontecimentos recentes são estimulantes para os que (como eu) acreditam que o senso comum mais elementar nos obriga a agir. Um deles foi a publicação do “President’s Climate Action Plan” no mês passado. Esse plano abrange a mitigação, a adaptação e a cooperação mundial. Seu objetivo é reduzir até 2020 as emissões de gases-estufa para níveis 17% inferiores aos de 2005.

O outro acontecimento, também ocorrido no mês passado, foi a publicação de um relatório – o “Risky Business” – por um poderoso grupo bipartidário que incluía o ex-prefeito de Nova York, Michael Bloomberg, os ex-secretários do Tesouro dos EUA, Hank Paulson e Robert Rubin, e o ex-secretário de Estado George Shultz.

Mas precisamos moderar nossa alegria. Mesmo se o governo implementar seu plano com êxito, ao explorar sua autoridade reguladora, será um começo apenas modesto. As concentrações de dióxido de carbono, metano e óxido nitroso subiram para níveis sem precedentes do último período de pelo menos 800 mil anos, muito antes do surgimento do “Homo sapiens”. Pelo nosso ritmo atual, o aumento será muito maior até o fim do século, e os impactos sobre o clima tenderão a ser grandes, irreversíveis e talvez catastróficos. Aumentos da média da temperatura de 5° C acima dos níveis pré-industriais são concebíveis à luz do nosso ritmo atual. O planeta seria diferente do que é hoje.

“Risky Business” revela o que isso poderia significar para os EUA. O documento se concentra nos danos aos imóveis e à infraestrutura litorâneos decorrentes da elevação dos níveis do mar. Examina os riscos de tempestades mais fortes e mais frequentes. Considera possíveis mudanças na agricultura e na demanda por energia, bem como o impacto da alta das temperaturas sobre a produtividade e a saúde pública. algumas áreas do país poderão se tornar quase inabitáveis.

O que faz do relatório um documento importante é que ele expõe a questão, corretamente, como um problema de gestão de risco. O objetivo tem de ser eliminar os riscos localizados na extremidade da distribuição das possíveis consequências. A maneira de fazer isso é mudar o comportamento. Ninguém pode nos vender seguros contra mudanças planetárias. Já vimos o que o risco remoto, localizado na extremidade da distribuição de riscos, significa em finanças. No âmbito do clima, as extremidades são mais encorpadas e tendentes a ser muito mais prejudiciais.

A questão é se uma coisa real e importante pode derivar desses novos começos modestos. Pode sim, embora deter o aumento das concentrações de gases-estufa é coisa que exige muito esforço.

Sempre pensei que a maneira de avançar seria por meio de um acordo mundial de limitação das emissões, à base de alguma combinação entre impostos e cotas. Atualmente considero esse enfoque inútil, como demonstra o fracasso do Protocolo de Kyoto de 1997 em promover qualquer verdadeira mudança na nossa trajetória de emissões. O debate político em favor de políticas públicas substanciais terá sucesso se, e somente se, duas coisas acontecerem: em primeiro lugar, as pessoas precisam acreditar que o impacto da mudança climática pode ser ao mesmo tempo grande e caro; em segundo lugar, elas precisam acreditar que os custos da mitigação serão toleráveis. Esse último fator, por sua vez, exige o desenvolvimento de tecnologias confiáveis e exequíveis para um futuro de baixos teores de carbono. Assim que ficar demonstrada a viabilidade de um futuro desse tipo, a adoção das políticas necessárias será mais fácil.

Nesse contexto, os dois novos documentos se corroboram mutuamente. “Risky Business” documenta os custos potenciais para os americanos da mudança climática não mitigada. O foco do governo em padrões reguladores é, portanto, uma grande parte da resposta, principalmente porque os padrões certamente obrigarão a uma aceleração da inovação na produção e no uso da energia. Ao reforçar o apoio à pesquisa fundamental, o governo americano poderá desencadear ondas de inovação benéficas em nossos sistemas de energia e de transportes marcados pelo desperdício. Se promovida com urgência suficiente, essa medida também poderá transformar o contexto das negociações mundiais. Além disso, em vista da falta de mitigação até esta altura, uma grande parte da reação deverá consistir em adaptação. Mais uma vez, o engajamento dos EUA deverá fornecer mais exemplos de medidas que funcionam.

Secretamente esperava que o tempo desse razão aos opositores. Só assim a ausência de resposta a esse desafio se revelaria sem custo. Mas é pouco provável que tenhamos essa sorte.

Continuar no nosso caminho atual deverá gerar danos irreversíveis e onerosos. Existe uma possibilidade mais alvissareira. Talvez se mostre possível reduzir o custo da mitigação em tal medida que ele se torne politicamente palatável. Talvez, também, nos conscientizemos muito mais dos riscos. Nenhuma das duas hipóteses parece provável. Mas, se esses dois relatórios efetivamente motivarem uma mudança na postura dos EUA, as probabilidades de escapar do perigo terão aumentado, embora talvez tarde demais. Isso não merece dois, muito menos três vivas. Mas poderíamos tentar um. (Tradução de Rachel Warszawski)

Martin Wolf é editor e principal analista econômico do FT.

(Valor Econômico)
http://www.valor.com.br/opiniao/3607960/os-ceticos-estao-perdendo-espaco#ixzz36yVZ5PEw

The New Abolitionism (The Nation)

Transgênicos, 20 anos de avanços e polêmicas (Valor Econômico)

JC e-mail 4973, de 16 de junho de 2014

Futuro imaginado: desafio dos cientistas é entender a soja como um circuito, onde todas as peças são conhecidas

Vinte anos após a aprovação do primeiro alimento geneticamente modificado do mundo – um tomate com maior durabilidade criado na Califórnia -, o mercado de transgênicos atinge a maturidade com números expressivos, ainda que cercado de polêmicas. A cada 100 hectares plantados com soja hoje no planeta, 80 já são de sementes com os genes alterados. No caso do milho, são 30 para cada 100, o que significa que a chance de encontrar essas matérias-primas na dieta alimentar humana e animal cresceu substancialmente.

Em menos de duas décadas, a área com culturas transgênicas subiu 100 vezes, de 1,7 milhão de hectares para 175,2 milhões. Os EUA continuam na liderança desse processo, com 70 milhões de hectares e 90% de adoção de tecnologia em lavouras de soja, milho e algodão, espelhando uma tendência em outros grandes países agrícola.

Com movimentação global de US$ 16 bilhões em 2013 nessas tecnologias, as companhias agrícolas travam uma “batalha de foice no escuro” para arrebatar mercados ainda não conquistados.

Na soma de perdas e ganhos, os produtores rurais dizem ter angariado benefícios, o que justificou a adoção da tecnologia. Desde a aprovação para consumo do tomate “Flavr Savr”, desenvolvido pela Calgene (comprada pela Monsanto), em 1994, a redução das aplicações de inseticidas recuaram 90% até 2010. O uso de herbicidas também caiu, embora casos pontuais de resistência de plantas daninhas ao glifosato, tenham acendido o sinal amarelo no Sul do Brasil e em regiões do EUA. A Monsanto, detentora da tecnologia, credita esses episódios a erros do produtor, como falta de rotação de culturas e o mau uso de produtos químicos.

Se os números até agora são favoráveis, a descoberta de novos “eventos” – o jargão da indústria para variedades novas – é crucial para manter o fôlego da indústria. Nos EUA, os pedidos para liberações de testes de campo, um medidor importante da intensidade das pesquisas em biotecnologia agrícola, têm se mantido à ordem 800 por ano, segundo o Departamento de Agricultura dos EUA (USDA). A Monsanto é a empresa que mais protocola esses pedidos junto às autoridades americanas, seguida por DuPont Pioneer e Syngenta.

No Brasil, 53 tiveram a liberação planejada no ambiente aprovadas este ano pela Comissão Técnica Nacional para a Biossegurança (CTNBio) e 19 aguardam o O.K. comercial – a maior parte para milho e soja, com novidades também em cana-de-açúcar e eucalipto.

Os esforços nos laboratórios estão centrados em trazer soluções para velhas e novas necessidades do campo. Questões agronômicas, como o aumento de produtividade, continuam norteando as pesquisas. Mas as mudanças no clima trouxeram demandas de outra ordem, como a de sementes resistentes ao calor e ao estresse hídrico.

A complexidade também mudou. Segundo os cientistas, para atender os sistemas de produção atuais, não basta reformular plantas com uma única característica. Kristie Bell, gerente de comunicação da DuPont Pioneer para América Latina, diz que o avanço está em construir variedades agrícolas com benefícios múltiplos – os chamados eventos “piramidados”, tidos como a evolução natural do conhecimento científico. É aí que reside o futuro da biotecnologia.

“À medida em que a população global crescerá de sete para nove bilhões até 2050, os produtores rurais enfrentarão necessidades pontuais tanto para elevar a produtividade quanto entregar alimentos mais nutritivos”, diz Bell, acrescentando que mais da metade das vendas de sementes da companhia já são de variedades transgênicas. Em 2013, a divisão de sementes da DuPont investiu US$ 2,2 bilhões em Pesquisa e Desenvolvimento (P&D), sendo que 60% foi destinado a inovações em agricultura e biotecnologia.

Extremamente complexas do ponto de vista fisiológico, essas sementes “piramidadas” tentarão agrupar o maior número possível de características genéticas novas. “Essa tem sido a maior demanda do mercado”, afirma Ricardo Abdenoor, pesquisador da Embrapa Soja. Nos países que adotaram a biotecnologia, a área com tratamentos combinados totalizou 47,1 milhões, ou 27% do total.

Hoje, o que há de mais avançado aprovado no mercado é a soja Intacta RR2 PRO, da Monsanto. A tecnologia combina resistência ao herbicida glifosato e é tolerância a lagarta e, segundo a empresa, entrega também um ganho de produtividade de 10% em relação à tecnologia anterior. A Intacta fez sua estreia no mercado brasileiro nesta safra, a 2013/14. “Ela foi aprovada apenas no mercado brasileiro porque não há incidência de lagartas nos Estados Unidos”, afirma Geraldo U. Berger, diretor de regulamentação da Monsanto no Brasil, segundo maior mercado para a multinacional americana.

Desde 1996 no mercado de sementes transgênicas, com a aprovação nos EUA da soja Roundup Ready (RR), tolerante ao herbicida glifosato, a Monsanto lidera o segmento com US$ 14,9 bilhões em vendas em 2013, 70% dos quais da divisão de sementes e genômica.

Se o agrupamento de características novas às plantas já é uma realidade nos centros de pesquisa agrícola, a remodelação completa de um cromossomo é o exercício mais difícil da engenharia genética. Elibio Rech, pesquisador da Embrapa Recursos Genéticos e Biotecnologia, diz o que se pretende é trabalhar com as plantas como um circuito, onde todas as peças são conhecidas. Nesse sentido, ao invés de substituir genes ou blocos de genes de uma soja, por exemplo, os cientistas criarão um cromossomo novo. “Queremos modificar a rota metabólica até reconstruir completamente um cromossomo. É a fronteira da fronteira científica”. A vantagem? Editar mais facilmente os gentes, ganhando tempo, dinheiro e agilidade na obtenção dos resultados.

Até agora, soja, milho e algodão mantiveram-se como as mais presentes no pipeline (produtos em desenvolvimento) das empresas. Segundo Adriana Brondani, diretora-executiva do Conselho de Informações sobre Biotecnologia (CIB), isso se explica porque “com o custo alto e o tempo de demora entre o desenvolvimento de uma variedade à chegada ao mercado, só as commodities pagam o investimento”. A tendência, porém, é que as pesquisas gradativamente contemplem outras culturas, de forma a minimizar a chamada “fome oculta” – alimentos populares mas com baixo valor nutricional.

Na Ásia, pesquisadores filipinos do Instituto Internacional de Pesquisa do Arroz (IRRI, em inglês) concluíram os testes de campo do recém-desenvolvido “arroz dourado”, variedade com altos níveis de vitamina A graças à modificação genética. Aqui, a Embrapa recebeu a aprovação comercial do feijão resistente ao vírus do mosaico, enquanto outro grupo de cientistas da entidade tenta criar uma alface enriquecida com ácido fólico.

Curiosamente, outro efeito da biotecnologia foi alavancar as pesquisas científicas convencionais, nas quais os cruzamentos são feitos sem a transferência de material genético. “O domínio da biologia molecular ajudou os cientistas a entender melhor e aperfeiçoar as plantas”, diz Adriana, do CIB.

Por causa disso, a Monsanto tornou-se também a maior empresa global de sementes de hortifrutis convencionais, com legumes mais doces, crocantes e nutritivos. “A Monsanto acumulou tanto know-how científico que criou vegetais com as vantagens da engenharia genética sem lançar mão de qualquer traço Frankenstein”, escreveu a revista americana “Wired”, repetindo o termo usado por grupos contrários à tecnologia para se referir aos transgênicos. “Se não precisassem de agrotóxico, poderiam até ser considerados orgânicos”.

(Bettina Barros / Valor Econômico)
http://www.valor.com.br/agro/3584620/transgenicos-20-anos-de-avancos-e-polemicas#ixzz34o6ixLiV

Agora manteiga faz bem e carne faz mal? (Jornal da Ciência)

JC e-mail 4973, de 16 de junho de 2014

Artigo de Luís Maurício Trambaioli para o Jornal da Ciência

Está sendo amplamente divulgado na mídia um recente estudo em que os pesquisadores de Harvard, a partir de questionário de perguntas feito em 1991 a enfermeiras, inferiu que mulheres teriam 22 % de risco relativo aumentado de câncer de mama quando consumindo uma porção a mais de carne vermelha que mulheres que consomem menos.

Entretanto, risco relativo não é risco absoluto, o qual pode ser calculado pelos dados originais. A chance de desenvolver a doença seria vista em 1 em cada 100.000 mulheres, e não em 22 em cada 100 mulheres como tem sido noticiado pela falsa impressão que o ‘risco relativo’ nos dá. Mais, esta incidência é exatamente em grupos de mulheres que mais fumam.

É importante cuidado na forma que se divulga as notícias de estudos epidemiológicos e feitos por apenas um grupo. Melhor seria obter um parecer de especialistas na área e ainda preferencialmente resultados advindos de mais estudos obtidos por outros pesquisadores, evitando assim bias e viés na ciência. Sob risco de acontecer acusações levianas como ocorrido na década de 80 que levou a demonizar a gordura saturada há exatos 30 anos sem evidências científicas que suportassem tal idéia, o que direcionou a humanidade ao desespero de consumo de alimentos sem gordura e compensando com a ingestão de mais “carboidratos complexos” (amido) e baixos em micronutrientes. E o resultado foi a epidemia de diabetes e obesidade (chamado no exterior de diabesity), doenças cardiovasculares, câncer, dentre outras.

E agora, o que cortar do bacon: a gordura ou a carne ?

Luís Maurício Trambaioli é professor associado da Faculdade de Farmácia da UFRJ e pesquisador associado do INMETRO

Referências:

BMJ – “Dietary protein sources in early adulthood and breast cancer incidence: prospective cohort study” – http://dx.doi.org/10.1136/bmj.g3437

Resposta ao estudo: http://www.bmj.com/content/348/bmj.g3437?tab=responses

Time Magazine, 26/03/1984 – And Now the Bad News –
http://content.time.com/time/specials/2007/article/0,28804,1704183_1704257_1704499,00.html

Time Magazine, 23/06/2014 – Ending the War on Fat – http://time.com/2863227/ending-the-war-on-fat/
http://oglobo.globo.com/sociedade/saude/carne-vermelha-pode-aumentar-risco-de-cancer-de-mama-diz-estudo-de-harvard-12803653

We Have a Weather Forecast For Every World Cup Match, Even the Ones a Month Away (Five Thirty Eight)

It’s the moment every soccer fan’s been waiting for. The teams are out on the field and the match is about to begin. Then comes the rain. And then the thunder. And then the lightning. Enough of it that the match is delayed.

With the World Cup taking place in a country comprising several different ecosystems — a rain forest among them — you’re going to be hearing a lot about the weather in Brazil over the next month.

But we don’t have to wait until the day of — or even five days before — any given match to get a sense of what the weather will be. We already know the broad outlines of the next month of weather in Brazil — June and July have happened before, after all, and somebody kept track of whether it rained.

I did something like this for the Super Bowl in New York, when I provided a climatological forecast based on years worth of historical data. This isn’t the most accurate way to predict the weather — seven days before a match there will be far better forecasts — but it is a solid way to do it many weeks in advance.

I collected past weather data for the World Cup’s timespan (mid-June through mid-July) from WeatherSpark and Weather Underground for the observation stations closest to the 12 different World Cup sites. Keep in mind, the data for the different areas of Brazil hasn’t been collected for as long as it has in the United States. In some cases, we only have records since the late 1990s, which is about half as many years as I’d like to make the best climatological assessment. Still, history can give us an idea of the variability of the weather in Brazil.

You can see what high temperatures have looked like for the 12 World Cup sites in the table below. I’ve taken the average, as well as the 10th, 25th, 75th and 90th percentile for past high temperatures. This gives us a better idea of the range of what could occur than just the average. Remember, 20 percent of high temperatures have fallen out of this range.  (For games starting in the early evening, knock off a few degrees to get the expected average.)

enten-feature-worldcupweather3

What we see is that the weather can be quite comfortable or hot, depending on the site. In the southern coastal region, we see high temperatures that average below 70 degrees Fahrenheit in the cities of Curitiba and Porto Alegre. (I’ve presented all temperatures in Fahrenheit.) It may seem odd to you that southern areas are actually coolest, but remember that this is the southern hemisphere, so everything’s topsy-turvy for a Northerner. It’s winter in Brazil, and climatology suggests that we shouldn’t be surprised if the high temperature is below 60 degrees at one of these sites.

Host sites for the 2014 World Cup.
Wikimedia CommonsHost sites for the 2014 World Cup.

But most of the country is not like these two sites. Belo Horizonte and Brasilia reach the mid- to high 70s usually, but don’t go too much higher because of their elevation (2,720 feet for the former and 3,500 feet for the latter). From Rio de Janeiro northward, temperatures average 80 degrees or greater, but winds from the ocean will often keep them from getting out of hand.

The site tied for the highest median temperature is Manaus, which is also surrounded by the Amazonian rainforest, making it the most interesting site climatologically. There’s a 15 percent chance that it will rain in Manaus on any given day during the tournament. In small quantities, rain can help a passing game by making the grass slick, but if there’s too much precipitation, it can slow the ball significantly as the pitch gets waterlogged. And that doesn’t even get to the threat of lightning, which can halt a game completely.

But Manaus isn’t the site with the highest chance of rain. (Just the highest chance of thunderstorms.) To figure out what is, I looked at the average rainfall and thunderstorm tallies during the 1 p.m. to 6 p.m. hours during June and July in past years. From there I estimated the chance of rain during two-hour stretches in the afternoon and early evening, rather than for the entire day.

So here are approximations for each site on rain and thunderstorms during the games:

enten-weather-table-1It probably won’t rain during any given match, but if it does it’s likely to be in the sites closest to the tropics in the north and thehumid subtropical climate in the south. Recife, for example, has the best chance of rain of any site in the country, in part because it’s right where a lot of different air masses combine, which makes the weather there somewhat more unpredictable.

Thunderstorms, on the other hand, rarely occur anywhere besides Manaus, where the chance of a thunderstorm in a given afternoon hour is in the double digits. Manaus is also where the United States will be playing against Portugal in its second match; climatology suggests it should be a muggy game.

The Americans’ other games are likely to be hot but dry. The United States’ first match, against Ghana, is in Natal on Monday, a city that normally is expected to offer a high temperature around 84 degrees, with a slightly cooler temperature by the evening game time. The current forecasts (based on meteorological data, rather than climatology) are calling for something around normal with around a 15 percent chance of rain, as we’d expect. The weather for the U.S. team’s third match, on the coast in Recife, should be about the same. Thunderstorms probably won’t interrupt the game, but rain is possible.

Most likely, though, the weather will hold up just fine. The optimistic U.S. fan can safely engage in blue-sky thinking — for the team’s chances, and for the skies above it, even if our coach is finding another way to rain on the parade.

World Bank Revamping Is Rattling Employees (New York Times)

By ANNIE LOWREY

MAY 27, 2014

WASHINGTON — The World Bank, a famously bureaucratic institution, is undergoing its first restructuring in nearly two decades. The overhaul is intended to keep it relevant at a time when even the poorest countries can easily tap the global capital markets, but with just weeks to go, the process has turned into what several staff members described as a nightmare, stalling their work and sapping morale.

In an interview, Jim Yong Kim, the American doctor and former president of Dartmouth College who took over leadership of the bank two years ago, strongly defended his plan. The overarching goal is to break down the bank’s regional “silos,” he explained, which discourage, for instance, experts who are working on mobile banking in sub-Saharan Africa from sharing best practices with experts handling the same issue in Central America.

To tackle that problem, Dr. Kim has created more than a dozen new global practices — on subjects like trade, health and infrastructure. Technical staff based in Washington will be organized into those practice groups as of July 1. “We had to make this change in order to really force the information to flow,” Dr. Kim said.

“We had to make this change in order to really force the information to flow,” said Jim Yong Kim. Credit Jonathan Ernst/Reuters

Along with that restructuring of 15,000 bank employees, Dr. Kim has also undertaken a sweeping financial review, to squeeze out inefficiencies and cut $400 million from the bank’s operating budget.

“This is the first time we’ve been able to say: Here’s where the revenue’s coming from” and where the spending is going, Dr. Kim said. “For the first time, we’re going to be able to compare expenditures.”

Current and former staff members said they agreed that change needed to come to the World Bank. “The bank is losing its relevance in middle-income countries,” said Uri Dadush, the director of the international economics program at the Carnegie Endowment for International Peace, referring to countries like India, China and Brazil.

“These countries don’t need a $1 billion or $2 billion loan from the bank,” Mr. Dadush said. “And many of the countries now have a lot of indigenous capacity to analyze and make technical decisions” without assistance from World Bank experts, he added.

Dr. Kim pointed out that the bank had recently doubled its lending capacity for middle-income countries.

The complaints from the bank’s core staff in Washington, most of whom spoke on the condition of anonymity because they feared retaliation, started piling up almost as soon as Dr. Kim initiated the reorganization. And over time, more and more of those complaints have been directed at Dr. Kim personally.

“This is not the way you run a change program,” said Paul Cadario, who worked at the bank for more than three decades. “No vision. No communications mechanism. No indication when it’s all going to be over.”

That turmoil has created what some people inside the World Bank described as a toxic environment. In not-for-attribution interviews, midlevel officials voiced concerns about such moves as restrictions on travel expenses even as hordes of highly paid McKinsey and Booz Allen consultants roamed the halls — and Dr. Kim was accused of hypocrisy for his own expenditures.

“The staff are clearly unhappy,” said Nancy Birdsall, the president of the Center for Global Development, a Washington-based research group. “There’s been a loss of confidence, not necessarily in the idea of the reorganization, but in the process.”

Yet even some World Bank staff members said that employees’ own sense of entitlement, and the fact that the bank had not undergone such a major internal review in nearly two decades, also explained some of the negative reaction.

In part, employees said they were concerned about personnel decisions. Four dozen executives have had to apply for new jobs. Last year, three highly regarded female executives were also unceremoniously pushed from their positions, which angered many other women at the bank.

Others said they were unimpressed with the executives named to lead the global-practices teams. “They’re good people, they might be great people,” said one bank official. “But they’re not top-quality people. These aren’t big names.”

Moreover, the global-practices leaders did not include any people from Africa or East Asia, arguably the bank’s two most important client regions. When African governors of the bank objected, Dr. Kim sent a letter to reply, if not to apologize.

“Thank you for our meeting yesterday,” it said. “I apologize for having had to leave so quickly; I had a meeting scheduled immediately after our session. I would like to take this opportunity to reiterate to you my personal commitment to diversity and specifically the inclusion of Africans among all ranks of staff at the World Bank Group.”

Another central concern is that the restructuring has taken up too much time, distracting the bank’s workers, rattling relations with clients and leading to risk aversion. “People are desperately trying to justify themselves and veering away from projects that might raise questions,” a staff member said.

But Dr. Kim pointed out that the bank was on track to do more business this year than it did last year; during earlier restructurings, parts of the bank’s business shrank. High-level bank employees also stressed that Dr. Kim had instituted regular review processes that would reduce the need for such stark reorganizations in the future.

Pettier concerns have abounded, too. As part of the $400 million cost-cutting exercise, the bank issued new guidelines on travel, limiting business-class flights and even adjusting breakfast allowances. “Leadership needs to reflect: Are ‘breakfast savings’ worth the ‘expense’ of staff morale?” said one letter in a popular alumni newsletter.

Perhaps no change caused more outrage than the elimination of parking subsidies for the crowded and expensive downtown garages where many officials park. Yet “to subsidize parking is a little weird for an organization like us,” countered Bertrand Badré, the bank’s chief financial officer, pointing out that the bank is committed to combating climate change.

Many complaints, serious and frivolous, have also questioned Dr. Kim’s management — especially concerns about his lack of communication with rank-and-file employees and perceptions of his overspending when asking the rest of the bank to cut back.

A much-discussed Financial Times editorial rebuked him for his use of private planes. One other popular rumor had Dr. Kim purchasing a tuxedo and charging the World Bank for it.

A press officer responded that Dr. Kim had taken chartered planes only to otherwise inaccessible destinations, and that he had used them less frequently than past presidents. (More than 90 percent of his travel is commercial, the spokesman said.) And the tuxedo story is just a story, he said: Dr. Kim had purchased white-tie wear for a Nobel Prize event, but he paid for the clothes himself.

Dr. Kim said that he did think he could have communicated about the restructuring process more clearly, and sooner. “I’ve been told this a million times by people who have gone through this,” he said. “It’s this notion that you can never communicate enough.” He added: “If I were to give anyone else advice, it would be to overcommunicate from the beginning.”

For all the complaints, many others involved with the bank and its lending policies said they supported the reorganization. “Let’s keep the mission of the bank in mind,” said Ian Solomon, a former World Bank executive director. “This is not about whether people in Washington are comfortable, or whether the process is simple. Development is hard. There’s a lot more we don’t know about getting it right than we do know.”

He added: “I applaud Jim for taking this one on.”

The Obama administration, which effectively named Dr. Kim to his post, also threw its weight behind the reorganization. “The United States is confident that the World Bank’s restructuring addresses the changing development challenges of the 21st century and will better equip the bank to meet its global mission,” said Marisa Lago, the assistant Treasury secretary for international markets and development. “Implementation and execution are key to this process.”

And Dr. Kim himself said that he believed the bank’s staff would see dividends after July 1. “I think it’s going better than I could have imagined two years ago,” he said.

Setor privado é essencial para adaptação às mudanças climáticas (Fapesp)

Para Laura Canevari, da Acclimatise, engajar empresas em discussões sobre o tema significa criar uma economia resiliente, assegurar empregos e desenvolvimento. Para isso, no entanto, cientistas devem traduzir conceitos em experiências reais (foto:Rogério Lima)

28/05/2014

Por Karina Toledo, de Fortaleza

Agência FAPESP – As mudanças climáticas são uma realidade cada vez mais difícil de ser ignorada e à humanidade resta adaptar-se para reduzir seu grau de vulnerabilidade. Diante dessa necessidade premente, cientistas têm se esforçado para engajar os formuladores de políticas públicas nas discussões sobre o tema. No entanto, pouca atenção é dada a um importante ator da sociedade: o setor privado.

A análise foi feita pela colombiana Laura Canevari, consultora em adaptação às mudanças climáticas, durante a conferência internacional Adaptation Futures 2014, ocorrida entre 12 e 16 de maio em Fortaleza. Formada em Ciências Marinhas, com mestrado em Manejo de Mudanças Climáticas pela University of Oxford, no Reino Unido, Canevari já atuou como militante, defendendo a necessidade de adaptação das zonas costeiras contra a elevação do nível do mar.

Atualmente, trabalha para a Acclimatise, empresa britânica que presta assistência técnica a instituições governamentais e empresas privadas no entendimento de riscos relacionados às mudanças climáticas e ajuda a identificar soluções de adaptação viáveis.

Na avaliação de Canevari, o setor público tem o importante papel de regulamentar e criar um ambiente adequado para que ações de adaptação aconteçam, mas é o setor privado que vai colocá-las em prática. A fim de engajar as empresas na empreitada, porém, os cientistas terão de adaptar sua linguagem e traduzir os conceitos científicos em experiências reais do cotidiano.

Leia abaixo trechos da entrevista concedida por ela à Agência FAPESP.

Agência FAPESP – Qual é a sua formação e área de atuação na Acclimatise? 
Laura Canevari – Sou formada em Ciências Marinhas e fiz mestrado em Manejo de Mudanças Climáticas na University of Oxford, no Reino Unido. Antes de começar a trabalhar na Acclimatise eu era uma grande defensora da necessidade de adaptação da zona costeira contra a elevação do nível do mar.

Agência FAPESP – Vocês trabalham mais com o setor público ou o privado?
Canevari – Inicialmente nosso foco era o setor privado, mas temos nos voltado mais ao setor público, pois as negociações internacionais estão mais focadas em adaptação e os governos estão mais preocupados com as mudanças climáticas. Recentemente, ajudamos a elaborar o Plano Nacional de Adaptação do Quênia, por exemplo. Ajudamos a desenvolver a estratégia de adaptação das cidades de Londres e Leeds [ambas no Reino Unido], Moscou e outras cinco na Rússia. Muitas vezes, o que fazemos para os governos é fomentar a capacidade institucional, ajudar a identificar lacunas e necessidades em nível institucional. Se um país quer começar a pensar em mudanças climáticas, quais são as coisas que as instituições têm de ser capazes de lidar, como coordenar informação entre diferentes ministérios, como coletar e armazenar informações, como usar serviços meteorológicos para obter dados precisos sobre mudanças climáticas. Atuamos em diferentes setores, como energia, transporte, varejo e cadeias de abastecimento.

Agência FAPESP – Em sua palestra você afirmou que a academia, no que se refere às discussões sobre adaptação às mudanças climáticas, está muito focada no setor público e deveria prestar mais atenção ao setor privado. Por que pensa assim? 
Canevari – Não penso que devemos parar de investir tempo e energia no setor público. Ele é importante, pois permite regular as ações de adaptação às mudanças climáticas necessárias e criar o suporte e o ambiente favorável para que elas aconteçam. Mas não deveríamos olhar para o setor público como o implementador dessas medidas. Quem realmente vai colocar em prática as soluções de adaptação é o setor privado. O setor público deve permitir às empresas investir mais seguramente nesse tipo de tópico. Não é a primeira vez que falo da necessidade de os acadêmicos mudarem sua mentalidade sobre quais são os mais importantes setores da sociedade com quem temos de dialogar. Mas nós, cientistas, tendemos a ficar em nossas zonas de conforto, onde falamos todos a mesma linguagem e lidamos com os problemas da mesma forma. E dialogar com o setor privado requer uma mudança no discurso sobre as questões climáticas. Falamos do ponto de vista de políticas públicas e com uma mentalidade acadêmica e isso não vai funcionar. Precisamos mudar a forma como concebemos os problemas e as soluções.

Agência FAPESP – Como os cientistas conseguirão o engajamento do setor privado? 
Canevari – Primeiro, precisamos reconhecer que esse é um importante ator, pois isso nos fará ter curiosidade sobre como ele pensa. Os acadêmicos costumam ficar muito fechados na academia, mas viram rapidamente a necessidade de disseminar a informação para os governos. Fizeram, então, o esforço de compreender o que ressoa com a governança para discutir questões que vêm da ciência e transformá-las em políticas públicas. Mas os acadêmicos precisam entender que o setor privado tem diferentes formas de conceber riscos e lidar com eles. Para um homem de negócios, lidar com riscos significa a continuidade de sua produção. Então falar sobre a continuidade do negócio é uma forma de abordar questões de adaptação sem usar esse termo. É preciso traduzir a linguagem. Falamos muito aqui sobre o cenário de “4 graus Celsius” [de elevação da temperatura terrestre até 2100] e parece que todos entendemos o que isso significa sob um ponto de vista ambiental. Mas o que os 4 graus Celsius significam para uma empresa? Nós fizemos uma análise de risco para um porto na Colômbia na qual olhamos o impacto do aumento das temperaturas na performance do maquinário que retira a carga dos barcos e leva para o estoque. Essas máquinas são sensíveis ao estresse térmico e não trabalham tão bem com muito calor. Em vez de ir para o setor privado e dizer: “Há uma ameaça de subir 4 graus Celsius”, devemos dizer que os maquinários vão começar a trabalhar de forma mais lenta e não serão tão eficientes em realizar o trabalho e isso vai afetar os lucros. No fim das contas, é preciso abordar a questão do lucro e de como a mudança climática vai afetar a performance empresarial. Outro ponto de muito apelo para as empresas é: como conseguirão manter sua licença social e ambiental para operar. Se a força de trabalho atua ao ar livre e há uma alta incidência de estresse térmico, há um risco de segurança ocupacional. A empresa pode perder a habilidade de operar em uma determinada área se não se preocupar em avaliar como o estresse térmico provocado pela elevação de temperatura afetará seus empregados. É um trabalho de transformar conceitos em experiências reais do cotidiano.

Agência FAPESP – Se é tudo uma questão de lucros, por que é importante estimular o setor privado a se adaptar? 
Canevari – Porque se trata de construir uma economia resiliente. Precisamos parar de ignorar o setor privado, pois ele é parte importante das comunidades e oferece empregos, bens e serviços. Quando pensamos nos fatores que determinam o bem-estar das sociedades, temos as políticas públicas que criam regulamentações, códigos de conduta para as pessoas interagirem umas com as outras de formas não agressivas, garantem liberdade de expressão, democracia, etc. Esses são componentes importantes, mas os produtos e serviços que as pessoas desejam adquirir também são. As pessoas também desejam estar empregadas, pois é uma forma de conseguir reconhecimento na sociedade. Não é apenas pelo dinheiro em si, mas porque você assume um papel social quando tem um emprego. Por outro lado, o setor privado tem o dinheiro e o potencial de investir em atividades que podem ter implicações que vão além da própria organização.

Agência FAPESP – Já é possível perceber ações de adaptação no setor privado?
Canevari – Há dois tipos de empresas que estão liderando ações de adaptação. No primeiro, estão as empresas que fizeram grandes investimentos em estruturas de longa duração, como petrolíferas, empresas de energia e portos. São companhias que esperam que aquelas instalações durem 30 ou 40 anos. Nesse tipo de empresa também costuma haver muita pressão dos stakeholders e da sociedade, que espera padrões elevados em termos ambientais e sociais. Do segundo tipo fazem parte as empresas que estão se adaptando e que são as sensíveis a fatores climáticos, como as que produzem ou comercializam bens agrícolas e empresas que dependem fortemente de água. São empresas que já sentem fortemente os impactos das mudanças no clima e respondem a eles como forma de sobreviver, pois, se não melhorarem seus padrões de eficiência no uso de energia e água, poderão ter conflitos com a comunidade em que estão inseridas e com a mídia. Mas não há muita coisa sendo feita na América Latina, o que é uma pena, pois há grandes oportunidades em países como o Brasil, onde é possível começar da maneira correta. Muitos novos investimentos em infraestrutura podem ser feitos à prova do clima. É muito mais barato do que fazer a adaptação depois que já estiver pronto. Temos uma oportunidade que os países desenvolvidos já perderam, que é começar na direção certa. Temos experiências e aprendizados de outros países, sabemos o que vale a pena fazer, então é só colocar em prática.

Agência FAPESP – Há quem diga que foi o próprio setor privado o responsável pelas mudanças climáticas.
Canevari – Podemos dizer que o setor privado é responsável pela maior parte das emissões de gases-estufa e a mudança climática é basicamente causada por eles. Mas estamos falando de apenas cerca de 20 grandes empresas, responsáveis por mais de 80% das emissões. A maioria é da área de óleo e gás, mineração e agricultura. Então, estamos falamos de um pequeno número de empresas em oposição a uma enorme gama de outras companhias que compõem o setor privado. Há uma enorme diversidade. Por que também não estamos culpando os governos por não criarem as regulamentações apropriadas para essas empresas? Muitos governos reduzem a rigidez de sua regulamentação para atrair essas empresas poluidoras. Penso que os governos também são responsáveis por permitir que essas empresas atuem como bem entendem. A empresa age de acordo com os seus interesses. Cabe ao governo regular essas atividades e garantir que estejam dentro de limites aceitáveis.