For the past two decades, scientists have been monitoring the effects of a warming Arctic on the world’s polar bears — and the bears' future has looked increasingly bleak.
The latest estimates suggest that Arctic sea ice is disappearing by 14 percent a decade, drastically limiting the bears’ ability to hunt the seals on which they feed. And research on bears living on the Arctic islands of Svalbard shows that the animals are now reproducing at a rate one-fifth of that seen just 20 years ago.
Given these dismal statistics, scientists now predict that the global population of polar bears could fall from 20,000 to 30,000 today to fewer than 5,000 by 2100 — and beyond that no one knows. Even if a small population of bears manage to hang on, they’re not out of the woods.
Source : nbcnews
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