Caption
Chunks of Columbia Glacier, one of the fastest moving glaciers in the world, retreating since the early 1980s, litter the shore in Chugach National Forest, Prince William Sound, Alaska, USA. The Columbia Glacier is now the single largest glacial contributor to sea level in North America, producing about 10 percent of the water volume entering the sea from all Alaskan glaciers each year, May 2011
Availability
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