Russia fires cause "brown cloud," may hit Arctic (Reuters)

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Reuters - Smoke from forest fires smothering Moscow adds to health problems of "brown clouds" from Asia to the Amazon and Russian soot may stoke global warming by hastening a thaw of Arctic ice, environmental experts say.

More... (http://us.rd.yahoo.com/dailynews/rss/environment/*http://news.yahoo.com/s/nm/20100810/hl_nm/us_russia_fires)