Scientists say soot is to blame for Arctic thaw

07/29/2010 | San Francisco Chronicle

Soot plays a bigger role in climate change than had been thought, according to a study, and is the main reason why the Arctic's sea ice is melting. Coal, wood and dung burning, as well as engines with diesel, give off black and brown soot that settles on snow and ice, causing it to absorb more of the sun's energy, researchers say.

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San Francisco Chronicle