Read the following context and answer the question.
Context: 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 .
Question: How has global warming affected Polar bear habitats ?
Answer:


The melting of the ice caps has reduced the cold areas that polars require .