The Trump administration on Monday issued an emergency waiver to allow the sale of a higher-ethanol gasoline blend to be sold this summer nationwide, saying it will add to fuel supply during the peak U.

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.