On May 22, 2008, Alaskan officials announced that they would file a legal challenge to the Department of the Interior (DOI)'s decision to list the polar bear as threatened on the endangered species list. Governor Sarah Palin claimed that the listing was unnecessary and would have a negative economic impact on development in Alaska. The polar bear was put on the list after two years of research by multiple agencies within the DOI that culminated in a classification that required protections of the animal and its habitat, but permitted continued developments of oil and gas. In June 2011, a federal judge upheld the DOI's classification.
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