The Arctic climate threat that nobody’s even talking about yet

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When we think about the Arctic in a warming world, we tend to think about#-Link-Snipped-# and — that powerful symbol — the polar bear. But that’s far from the only problem that a melting Arctic brings.
In the past decade, scientists have been training more attention on another deeply troubling consequence. Rapid Arctic warming is expected to lead to the thawing of a great deal of frozen soil or permafrost, which, as it thaws, will begin to emit carbon dioxide and methane to the atmosphere. And if this occurs in the amounts that some scientists are predicting, it could significantly undermine efforts to reduce the world’s greenhouse gas emissions.
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