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China’s Suburban Sprawl Affects the World
Report Sees New Pollution Threat
From The New York Times
NASA/Goddard Space Flight Center
A satellite image from 2003 shows a dense blanket of polluted air over central eastern China covering the coastline around Shanghai.
Published: November 13, 2008
BEIJING — A noxious cocktail of soot, smog and toxic chemicals is blotting out the sun, fouling the lungs of millions of people and altering weather patterns in large parts of Asia, according to a report released Thursday by the United Nations.
The byproduct of automobiles, slash-and-burn agriculture, wood-burning stoves and coal-fired power plants, these plumes of carbon dust rise over southern Africa, the Amazon basin and North America. But they are most pronounced in Asia, where so-called atmospheric brown clouds are dramatically reducing sunlight in many Chinese cities and leading to decreased crop yields in swaths of rural India, say a team of more than a dozen scientists who have been studying the problem since 2002.
But the scientists who worked on the report said the blanket of haze might be mitigating the worst effects of greenhouse gases, by absorbing solar heat or reflecting it away from the earth. Greenhouse gases, by contrast, tend to trap the warmth of the sun and lead to a rise in ocean temperatures.
“All of this points to an even greater and urgent need to take on emissions across the planet,” said Achim Steiner, executive director of the United Nations Environment Program, in Beijing, which the report identified as one of the world’s most polluted cities, and where the report was released. “The imperative to act has never been clearer.”
