A U.N. report details the severity of the 'brown cloud' phenomenon affecting much of Asia and other parts of the planet. In addition to reducing sunlight and causing premature death, the clouds affect weather patterns, harvests, and glacier declines
"The byproduct of automobiles, slash-and-burn agriculture, cooking on dung or wood fires and coal-fired power plants, these plumes 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.
According to the United Nations report, smog blocks from 10 percent to 25 percent of the sunlight that should be reaching the city's streets. The report identified 13 cities as brown-cloud hot spots, among them Bangkok, Cairo, New Delhi, Tehran and Seoul, South Korea, but singled out the southern city of Guangzhou, where soot and dust have dimmed natural light by 20 percent since the 1970s."
"For those who breathe the toxic mix, the impact can be deadly. Henning Rodhe, a professor of chemical meteorology at Stockholm University, estimates that 340,000 people in China and India die each year from cardiovascular and respiratory diseases that can be traced to the emissions from coal-burning factories, diesel trucks and wood-burning stoves. "The impacts on health alone is a reason to reduce these brown clouds," he said."
FULL STORY: U.N. Reports Pollution Threat in Asia

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