El nino is a weather pattern caused by global warming that directly affects polar bears .Global warming has affected weather patterns that cause severe storms in the southern hemisphere .None of the above choices .The melting of the ice caps has reduced the cold areas that polars require .
How has global warming affected Polar bear habitats ?
The Center for Biological Diversity awarded Alaska Governor Sarah Palin the 2008 Rubber Dodo Award . Governor Palin won the award for fighting the Department of Interior 's designation of the polar bear as a threatened species . The polar bear is threatened by a shrinking habitat due to global warming .