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'Brown Clouds' Are World's Newest Environmental Threat By TINI TRAN AND JOHN HEILPRIN / AP WRITER Friday, November 14, 2008 BEIJING - A dirty brown haze sometimes more than a mile thick is darkening skies not only over vast areas of Asia, but also in the Middle East, southern Africa and the Amazon Basin, changing weather patterns and threatening health and food supplies, the UN reported. The huge smog-like plumes, caused mainly by the burning of fossil fuels and firewood, are known as "atmospheric brown clouds." Cars drive through thick smog on a street in Beijing in September 2008. Enormous brown clouds of pollution hanging over Asia are killing hundreds of thousands of people, melting glaciers, changing weather patterns and damaging crops, the United Nations said. (Photo: AFP) When mixed with emissions of carbon dioxide and other gases blamed for warming the earth's atmosphere like a greenhouse, they are the newest threat to the global environment, according to a report commissioned by the UN Environment Program and released Thursday. "All of these points to an even greater and urgent need to look at emissions across the planet," said Achim Steiner, head of Kenya-based UNEP, which funded the report with backing from Italy, Sweden and the United States. Brown clouds are caused by an unhealthy mix of particles, ozone and other chemicals that come from cars, coal-fired power plants, burning fields and wood-burning stoves. First identified by the report's lead researcher in 1990, the clouds were depicted Thursday as being more widespread and causing more environmental damage than previously known. Perhaps most widely recognized as the haze this past summer over Beijing's Olympics, the clouds have been found to be more than a mile (kilometer) thick around glaciers in the Himalaya and Hindu Kush mountain ranges. They hide the sun and absorb radiation, leading to new worries not only about global climate change but also about extreme weather conditions. "All t

Britain will overtake Germany as the country with the highest population in Europe, the United Nations predicted yesterday.

Disparities due to ethnicity

The working conditions of many poor African migrants in rural areas of southern Italy are "appalling", the international medical charity MSF says

Two years after having one of the lowest birth rates in the world, Georgia is enjoying something of a baby boom, following an intervention from the country's most senior cleric.

Proponents of Italy's new anti-immigration laws say they are a much-needed response to a serious problem, but critics say they recall the policies of the fascist dictator, Benito Mussolini, reports the BBC World Service's Madeleine Morris in Milan.