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Polar bear populations have dropped as sea ice melts.
Canada's polar bear population plummets - government report
More interactions between humans and polar bears are likely as sea
Annual Polar Bear Migration Under Way: How It Works and How Climate Change is Altering It
Climate Change and the Arctic - Marine Mammal Commission
Climate Change Affects Annual Polar Bear Migration
Annual Polar Bear Migration Under Way: How It Works and How
EXPLAINER: How warming affects Arctic sea ice, polar bears
Killing the Arctic
Why are Polar bears migrating to Russia from Alaska? International
Polar Bears Struggle as Sea Ice Declines