The White House on Monday rolled out a new plan that would allow higher blends of ethanol in vehicle fuels, amid concerns that the change could lead to more air pollution. The administration’s memo calls to extend the sale of E15 -- consisting of 15 percent of ethanol blended into gasoline -- year round. The fuel was blocked between June 1 and Sept. 15, as science shows burning ethanol in warmer temperature leads to heightened ground-level ozone pollution and smog. A senior White House official said the plan was part of President Trump’s free market plan. “This action is basically...