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2 Feb 2007 @ 15:39
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2 Feb 2007 @ 15:08
The melting of glaciers, such as these, in Alaska, is a catalyst for a global warming feedback loop.
Arctic permafrost, which is starting to melt due to global warming, is releasing five times more methane gas than previously predicted. That level of emission is alarming because methane itself is a greenhouse gas. Increased amounts will therefore accelerate warming, cause more melting of Siberian bogs and Arctic wasteland, and so release even more.
In addition to the methane built up, it is also known that vast amounts of carbon dioxide are locked in the planet's frozen zones. In total, it is estimated there could be as much as 450 billion tones of methane and carbon dioxide trapped in the world's permafrost. More >
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