In California, environmental regulators are voting today on a plan to ban the sale of new gasoline-powered automobiles by 2035, with only zero-emission vehicles and a limited number of plug-in hybrids available after that date. The decision by California’s Air Resources Board will likely accelerate the U.S. transition to an electric vehicle fleet. Passenger cars that burn gasoline or diesel account for about 40% of U.S. transportation-related emissions.