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Associated Press
FILE - In this Nov. 6, 2007, file photo, a polar bear mother and her two cubs are seen in Wapusk National Park on the shore of Hudson Bay near Churchill, Manitoba. About a third of the world's polar bears could face imminent threat from greenhouse gas emissions in as soon as a decade, according to a new report by the U.S. Geological Survey released Tuesday, June 30, 2015. The effects of diminished sea ice will lead to population declines throughout the century, and scientists didn't see a rebound in population numbers from the modeling that went up to the year 2100, according to the report. (Jonathan Hayward/The Canadian Press via AP, File) MANDATORY CREDIT

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