In this Oct. 23, 2010 photo, Russian scientist Sergey Zimov walks on a Siberian lake near the town of Chersky, Russia, where methane bubbles are trapped under the ice. Gas locked inside Siberia's ... more 
In this Oct. 23, 2010 photo, Russian scientist Sergey Zimov walks on a Siberian lake near the town of Chersky, Russia, where methane bubbles are trapped under the ice. Gas locked inside Siberia's frozen soil and under its lakes has been seeping out since the end of the last ice age 10,000 years ago. But in the last few decades, as the Earth has gradually warmed, the icy ground has begun thawing more rapidly, accelerating the release of methane _ a greenhouse gas 23 times more powerful than carbon dioxide _ at a perilous rate. less 
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Associated Press | Photo By Arthur Max
Fri, Nov 26, 2010 1:33 AM EST