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 Trump administration issued final rules requiring 1.5% annual increases in vehicle fuel efficiency through 2026 – far weaker than the 5% increases in the discarded rules set under former President Barack Obama. But the Trump administration also abandoned its August 2018 proposal to freeze requirements at 2020 levels through 2026. Last week, a trade group representing General Motors Co ( GM.N ), Fiat Chrysler Automobiles ( FCAU.N ), Toyota Motor Corp ( 7203.T ) and others sided with the Trump administration on its plan and opposed a legal challenge to further weaken the requirements. California Attorney General Xavier Becerra said the revised requirements “will increase costs to consumers and allow the emission of dangerous pollutants that […]