Full Breakdown
Environmental Groups Sue Over Trump Administration’s Fuel-Economy Rollback
By Drooid · · How we work
Core Event
A coalition of environmental organizations—including the Sierra Club, Center for Biological Diversity, Conservation Law Foundation, Environmental Defense Fund and Public Citizen—filed a petition for review in the U.S. Court of Appeals challenging the Trump administration’s recent reduction of Corporate Average Fuel Economy (CAFE) standards. The petition targets Transportation Secretary Sean Duffy and National Highway Traffic Safety Administration (NHTSA) administrator Jonathan Morrison, alleging that the new rules will lower vehicle efficiency, raise gasoline consumption and increase air pollution.
Background & Context
In early October 2026, the administration lowered the fleet-wide average fuel-economy target for passenger cars and light trucks to roughly 34.9 mpg for the 2031 model year, down from the 50.4 mpg projection set under the previous administration. The change was presented as a way to expand vehicle choice and lower purchase prices. Industry groups welcomed the shift, arguing that prior standards were overly stringent. The Department of Transportation (DOT) later projected that the rule would cut annual U.S. oil consumption by about 1.3 billion barrels by 2050, while NHTSA had previously estimated the 2024 standards would have saved 14 billion gallons of gasoline by that year.
Official Statements & Responses
Transportation Secretary Duffy framed the revision as eliminating an “illegal mandate” that forced automakers to produce more expensive electric vehicles, asserting that the change restores “affordable cars” for American families. Auto manufacturers and industry associations praised the new standards, contending that the prior rules constrained consumer options and increased costs.
Verbatim Quotes
- “We’re taking the Trump administration to court for this reckless rollback that prioritizes Big Oil and automaker profits over American families,” — Katherine Garcia, director of Sierra Club’s Clean Transportation for All program