President Barack Obama will announce tomorrow new rules for vehicle emissions and mileage, setting the first-ever nationwide standard for greenhouse-gas pollution, according to people familiar with the plan. The limit will be coordinated with new national fuel economy standards for cars and trucks, said the people, who asked not to be identified before the announcement. The action, which follows California’s push for approval of its own proposed standards, is the ‘biggest single step to curb global warming, Dan Becker, director of the environmental group Safe Climate Campaign, said in an interview. The White House’s top energy, environment and transportation officials have been meeting with automaker executives and other groups as the administration worked to craft a single national policy for vehicle emissions. It seeks to avoid the confusion of different state rules across the country. The Washington-based Alliance of Automobile Manufacturers, whose members include General Motors Corp., Chrysler LLC, Ford Motor Co. and Toyota Motor Corp., has called for a single standard. It’s ‘yet another indication of the growing consensus within the business community that Congress needs to take strong action on energy reform, and it needs to do it now, Dan Weiss, a director […]