![](http://www.alamy.com/thumbs/6/A0D58E95-B6A7-4E0C-8446-BC7F7347D0AE/2BE00FT.jpg)
McCall Glacier, 1958 and 2003
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Photo credit: © Science History Images / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1950, 1958, 2003, alaska, change, climate, colorized, compare, composite, ecology, effect, emissions, enhanced, environment, gas, glacial, glacier, global, greenhouse, ice, mccall, retreat, usa, warming