10 Animals Threatened by Global Warming

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Polar Bears

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(Paul J. Richards/AFP/Getty Images)

Polar bears feed by scouring openings in the ice for seals and other prey in the water. So as sea ice has disappeared, polar bears have had to look elsewhere to find food.

"We're getting a lot of anecdotal reports of emaciated polar bears wandering across Canada," Parmesan says. "They're starving, and they're going into dumping grounds."

She said that even if polar bears do find food in garbage dumps, they are not getting the proper nutrition and thus cannot thrive as a species.

Graham agrees that polar bears are in danger.

"They [polar bears] probably are one of the most endangered right now. We're already seeing impacts on their habitat, and they're really restricted pretty much to sea ice. That's their habitat, and that we've seen decrease significantly over the last decade," he says.

He said that if sea ice continues to diminish, polar bears could also disappear very quickly.

The U.S. Fish and Wildlife Service estimates that there are 20,000 to 25,000 polar bears worldwide.

Next: Musk oxen


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