More of the kind of thing nobody is paying attention to. In the northern regions, the ground is melting below our feet. We are all the polar bears living on thin ice.
A massive store of carbon—relics of long-dead plants and other living things—is preserved within the ancient permafrost of the Arctic. Ever-increasing global temperatures, however, threaten to set off a costly chain reaction: As the Arctic permafrost, frozen solid for millennia, begins to thaw, it will release carbon from these stores.
Source: Arctic Permafrost Thaw Would Amplify Climate Change – Eos