U.S. states sue Trump administration over fuel efficiency rollback

WASHINGTON (Reuters) - A group of 23 U.S. states and the District of Columbia filed a lawsuit on Wednesday challenging a Trump administration decision to weaken Obama-era fuel efficiency standards.In March, the administration issued final rules requiring 1.5% annual increases in vehicle fuel efficiency through 2026 - far weaker than the 5% increases set under former President Barack Obama. The Trump administration also abandoned its August 2018 proposal to freeze requirements at 2020 levels..