California abandons clean truck, locomotive rules after Biden's EPA doesn't grant waivers needed to depart from federal rules.

California for decades has driven the U.S. toward less-polluting vehicles. It is the only U.S. state with the power to request a waiver from the EPA to set its own, more stringent

California officials are withdrawing their final requests to enforce their nation-leading electric vehicle rules, days before President-elect Donald Trump's inauguration. State officials told U.S. EPA on Monday they wouldn't seek federal permission to enforce their rules covering zero-emission trucks and trains,