Polar bears are on the front lines of climate change in the Arctic and an indicator species for the effects of global warming.
How the effects of climate change in Arctic Canada are shrinking polar bears - The Globe and Mail
How Are Polar Bears Affected By Climate Change? - Environment Co
Polar bear attacks on humans could increase - Videos from The Weather Channel
Polar Bears and Walruses- An Arctic Odyssey, Svalbard – artphototravel
Polar bears in recent decades
Why polar bears became an icon of climate change •
Conservation Concerns Polar Bears International
Why Can't Polar Bears Evolve to Survive Climate Change?
Climate Change Affects Annual Polar Bear Migration
Scientists say they've found a direct link between planet-warming pollution and polar bear survival