Siberia

Siberia is home to the world's largest frozen peat bog, and as the bog melts into a series of lakes—as it's been doing for the past three or four years—it will release billions of tons of methane. One expert told New Scientist that as it melts, it will turn into an "ecological landslide". Read more.

Western Siberia is heating up faster than any other place in the world. When news of the area's warming trend was released last year, scientists immediately calculated that the methane released could lead to a 10 to 20 percent increase in global warming—fast. Read more.