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Polar Bears and Habitat Loss • U.S. Geological Survey predicts two-thirds of the world's polar
bears will disappear by 2050 • Shrinking sea ice → shrinking habitat
Ice-floe breakup in western Hudson Bay is currently occurring three weeks earlier than it did 30 years ago which reduces the polar bear's feeding season Female weight: 290 kg (640 lb) in 1980 and 230 kg (510 lb) in 2004.
