Polar bears: Extreme lack of sea ice in Hudson Bay puts predators under pressure

Polar Bears Are Starving Because of Global Warming, Melting Sea

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Global Warming Is Driving Polar Bears Toward Extinction

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Sea ice cometh to Hudson Bay: freeze-up has begun

Polar Bear National Wildlife Federation

Polar bears fight for survival as sea ice melts – video

Western Hudson Bay polar bears on their way offshore to hunt seals

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Melting Arctic Sea Ice: A Serious Threat to the Existence of Polar

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Federal Register :: Endangered and Threatened Wildlife and Plants