Today the White House will harmonize automobile emissions and mileage standards that California had been seeking with tough new national standards for the entire country. This move will accelerate by 4 years standards adopted by Congress in 2007 to get the nation’s vehicles at a target of 35.5 mpg and, for the first time, to impose limits on global warming pollution from cars and trucks. Today’s announcement means new standards will be in place between 2016 and 2020.