In Alaska, global warming has caused the Columbia Glacier to retreat more than 7 miles in the last 20 years, leaving calves of ice in Prince William Sound.
In Alaska, global warming has caused the Columbia Glacier to retreat more than 7 miles in the last 20 years, leaving calves of ice in Prince William Sound. Seth Borenstein/MCT
In Alaska, global warming has caused the Columbia Glacier to retreat more than 7 miles in the last 20 years, leaving calves of ice in Prince William Sound. Seth Borenstein/MCT

Drop in world temperatures fuels global warming debate

August 19, 2009 04:03 PM

UPDATED August 19, 2009 07:49 PM

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