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.

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.

The U.S. Environmental Protection Agency granted an emergency waiver permitting the nationwide sale of a fuel blend with higher amounts of ethanol through the summer months, which Iowa fuel and farm leaders say will help farmers,