Consumers across the U.S. still will be able to buy higher-ethanol blend E15 gasoline this summer, the Environmental Protection Agency announced Monday, saving them a little money at the pump but frustrating environmentalists who believe the move potentially harms the air and water.

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.

An Emergency Waiver from the EPA may alleviate some of the pain at the gas pump for drivers, but only if your car can use a specific type of fuel.