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File name:		 11-15a
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Title: MOST GLACIERS ARE RETREATING
Caption: Global warming is the primary cause for retreat of most of the world's glaciers, like Muir Glacier in Glacier Bay National Park, Alaska, shown here. Photograph (a) was taken on August 13, 1941. (National Snow and Ice Data Center, [a] W. O. Field)
Keywords: atmosphere, climates, climatology, global warming, glaciers, glacial ice, glaciation