US environmental regulators say they can't regulate vehicle emissions for climate

US environmental regulators propose to eliminate all greenhouse gas emission standards for cars, trucks, and engines. This would remove requirements for vehicle manufacturers to control emissions linked to global climate change.

This proposal signals a major shift in how US environmental regulators interpret their own authority. For years, the agency regulated vehicle emissions based on a finding that they endanger public health. This document argues the agency lacks the legal power to do so for climate change. If finalized, it would remove a significant regulatory cost for vehicle manufacturers and allow them to build vehicles that emit more greenhouse gases.