E15 gasoline generally costs at least 10 cents less a gallon than E10 gasoline, but the EPA had previously prohibited its sale during the summer over concerns that its use during the summer driving season could increase smog.

With Trump's EPA waiver on E15 summer sales, supporters say nation needs year-round access to gasoline with 15% ethanol to help cut pump prices.

Smith: Environmental Protection Agency Administrator Lee Zeldin recently issued a waiver making E15 available through the summer driving season. Ryan Yates, managing director of government affairs for the American Farm Bureau, says the decision allows consumers to have more fuel choices this summer.