Since 2007, the Renewable Fuel Standard (RFS) has required increasing levels of ethanol in gasoline blends sold in the U.S. Most fuel stations across the United States no longer offer pure gasoline, with E10—a blend of 10 percent ethanol and 90 percent gasoline—prevailing. After years of debate, the EPA has now announced it will study the possibility of reducing the amount of ethanol in the U.S. gasoline supply. Read more…