This one shouldn't surprise you. The polar bear has become the poster animal for the devastating changes global warming is bringing to the Arctic. Polar bears are dying because their range is shrinking; the sea ice they use to hunt seals is melting as temperatures rise. It's estimated that there are 20,000-25,000 polar bears worldwide. Thirty percent of the 19 recognized subpopulations are in decline. (Text: Shea Gunther)
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