President Donald Trump directed the U.S. Environmental Protection Agency to begin the process of lifting restrictions on the sales of E15 gasoline, a fuel blend containing gasoline and 15 percent ethanol, during summer months, according to an Oct. 11 news release from the White House. Currently, the sale of E15 is restricted during summer months due to concerns of smog formation from evaporative emissions. The move directs the EPA to commence rulemaking to expand the waivers for “Reid vapor pressure” – a measure of gasoline volatility – for blends containing up to 15 percent ethanol. While corn growers hailed the measure which will expand the sale of corn ethanol, the American Petroleum Institute called it a “bad deal for consumers” saying that three out of four vehicles currently on road are not compatible with E15, and that higher ethanol levels can harm engines and fuel systems. Trump also asked the EPA to examine reforms to increase transparency in the market for biofuel credits called Renewable Identification Numbers used to demonstrate compliance with the renewable fuel standard.