President Donald Trump announced on Tuesday that he urged the EPA to increase the sales of corn-based ethanol which would allow the year-round sale of E15 gas, which up by 5 percent over the blends that are now being sold in the U.S. Currently, the Clean Air Act restricts the sale of E15 gas during the months of summer. E15 gas is a mix of fuel that contains 85% gas and 15% ethanol.