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intv mann pfeffer glacial melt _00003809.jpg
intv mann pfeffer glacial melt _00003809.jpg

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    Glaciers melting around the world

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Glaciers melting around the world

CNN's Jonathan Mann speaks with glaciologist Tad Pfeffer about climate change.

Glaciers melting around the world

CNN's Jonathan Mann speaks with glaciologist Tad Pfeffer about climate change.