Reuters: Blending more than 10 percent ethanol into U.S. gasoline will result in more air pollution and more damage to engines, said an environmental group and a boating industry trade group on Monday. The Environmental Working Group (EWG) and the National Marine Manufacturers Association (NMMA) said evidence weighed against allowing a blend of up to 15 percent ethanol in gasoline. The groups will forward their findings to the U.S. Environmental Protection Agency, which is accepting …