Old Alaskan oil wells could be swallowed by the ocean as rising temperatures speed up erosion of the state's Arctic coastline.

QAQORTOQ, Greenland -- The biggest island in the world is a wind-raked place, gripped by ice over four-fifths of its land, prowled by polar bears, its coastlines choked by drifting icebergs and sea ice. Many of its 56,000 people, who live on the fringes of its giant ice cap, see the effects of global warming -- and cheer it on.