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.

The U.S. Environmental Protection Agency (EPA) on Monday issued an emergency fuel waiver allowing the sale of E15 gasoline nationwide this summer . E15, or gasoline blended with 15% ethanol, can already be sold year-round in some states. The EPA also issued the waiver on E15 sales last summer .