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Perhaps the most visible sign that Earth’s climate is warming is the gradual shrinking of its glaciers. In North America, the most visited glacier is the Athabasca Glacier, one of six glaciers that spill down the Canadian Rockies from the Columbia Icefield in western Canada.
Photograph ©2005 Hugh Saxby, glacier graph adapted from Dyurgerov and Meier, 2005.
Published May 15, 2007