REUTERS/John Gress
Anana, a six-year-old female polar bear, tries to stay cool at the Lincoln Park Zoo in Chicago, in this August 2, 2006 file photo. With their icy Arctic habitat melting, polar bears need new protections under the Endangered Species Act, Bush administration officials said on December 27, 2006, in a decision that raised questions about the president's skeptical stance on global warming. The U.S. Fish and Wildlife Service proposed that the bears, a white-furred icon of the North, be listed as "threatened" under the act. Photo taken on August 2, 2006.