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Thawing Permafrost -- Changing Planet


Thawing Permafrost

Because of a warming atmosphere, permafrost--the frozen ground that covers the top of the world--has been thawing rapidly over the last three decades. But there is cause for concern beyond the far north, because the carbon released from thawing permafrost could raise global temeratures even higher.

Credit: NBC Learn and the National Science Foundation (NSF)

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