If polar bears are in so much CO2-induced trouble, why is it still legal for people to seek them out and shoot them through the chest with a high-powered rifle?

Workshop addresses polar bears' plight amid global warming - Environment - MiamiHerald.com

ANCHORAGE, Alaska -- The female polar bear swam 370 nautical miles for nine days through the open water in the Beaufort Sea. After that, she alternately swam and walked on sea ice for another 970 miles.
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Amstrup, who used to work for the U.S. Geological Survey and now works for Polar Bears International, a conservation group, said hunting for polar bears may need to be curtailed in areas where the population is now declining. That may not be necessary in areas where the population is holding steady, he said.