Washington Post: The American Petroleum Institute and four other business groups filed suit Thursday against Interior Secretary Dirk Kempthorne and U.S. Fish and Wildlife Service Director H. Dale Hall, joining Alaska Gov. Sarah Palin’s administration in trying to reverse the listing of the polar bear as a threatened species. On Aug. 4, the state of Alaska filed a lawsuit opposing the polar bear’s listing, arguing that their populations as a whole are stable and that melting sea ice does not pose an …