Climate Cast: How is global warming changing the Arctic food chain?

In this undated file photo, a polar bear is shown in the Arctic National Wildlife Refuge in Alaska.
Subhankar Banerjee | AP 2010
Algae blooms under sea ice in the Arctic, so what happens when rising global temperatures make that ice disappear?
MPR News host Kerri Miller and chief meteorologist Paul Huttner explored this issue with University of Maryland research professor Jacqueline Grebmeier.
Catch the full conversation but selecting the audio player above.
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