At the moment, the world’s polar bear population appears to be stable. However, we know that polar bears rely on arctic sea ice to hunt, and that this sea ice has been melting at faster and faster rates in the summer.
"The US Geological Survey predicts that it will fall by two-thirds by 2050 if the Arctic ice where the animals live continues to shrink."
"There are “reservations†to be digested, he said, including questions raised by Alaska’s Republican governor, Sarah Palin.
Palin, 42, favours expanding the oil business. She says polar bears could be protected under existing laws without undermining the Alaskan economy."
http://www.timesonline.co.uk/tol/news/environment/article3382278.ece
Basically nobody is disputing that global warming will soon cause polar bear populations to decline, but some groups don't want to put it on the Endangered Species List because we don't know what actions would result. For example, it could justify regulating CO2 emissions nationwide.
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