Updated Feb. 13, 2013 at 3:28 p.m.

Premium Lock Melting arctic tundra releases a new climate change threat, UNC says

Published: 2013-02-13 15:04:00
Updated: 2013-02-13 15:28:14

Artic tundra torn by warming, ensuing runoff Artic tundra torn by warming, ensuing runoff Image 1 of 5 · Next Image…

Researchers at UNC-Chapel Hill have uncovered a new threat in the warming arctic tundra - melting of the permafrost and the subsequent release of previously frozen carbon into the atmosphere. The resulting carbon dioxide could double greenhouse gas emissions and thus have a big impact on climate change, the study finds....

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Ok Ok - so let's play along.

What was the arctic tundra before the asteroid hit the earth that caused it to re-freeze?

What was the arctic tundra doing before the three mini-ice ages since before records were kept?
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