Associated Press: A coalition of 10 environmental groups has filed a lawsuit seeking to block a sale next month of oil and gas leases on the Roan Plateau, an area with pristine backcountry that nearby residents, Gov. Bill Ritter and others hope to protect. The lawsuit filed Friday in U.S. District Court in Denver asks a judge to issue an injunction to stop the Bureau of Land Management from offering the leases in an Aug. 14 auction. About 55,186 acres of public land on the plateau, about 180 …