Global warming heats up the Arctic twice as fast as the rest of the world, meaning Alaska's beautiful northern tundra could vanish completely if temperatures continue to rise. As the tundra's permafrost melts, it not only drastically alters the ecosystem but also releases additional carbon — ironically hastening global warming.
Newsweek describes the problem: "In great swaths of land across much of Alaska’s vast central and northern interior, the past decade of too-warm winters has unlocked organic material that’s been trapped in icy ground for some 30,000 years. That ground is made of permafrost: many yards of mammoth bones, grasses, soil and other detritus frozen when this land was steppe tundra, ice-cold all year round. Now that permafrost is thawing. The land, losing its ice content, is receding."