Reuters: Environmental groups sued the Bush administration on Thursday to stop plans to allow oil and natural gas drilling in the icy Chukchi Sea off Alaska, which they claim will endanger polar bears. The U.S. Interior Department plans to lease about 30 million acres of land in the Chukchi Sea — home to about 10 percent of the world’s polar bear population — on Feb. 6. Environmental groups including the National Audubon Society, Natural Resources Defense Council and Earthjustice …