The U.S. Environmental Protection Agency (EPA) seeks to rescind its 2009 Greenhouse Gas Endangerment Finding and repeal all greenhouse gas (GHG) emission standards for light-duty, medium-duty, and heavy-duty vehicles and engines.

The 2009 declaration justifies over $1 trillion in emissions regulations, including the Biden-Harris Administration’s electric vehicle (EV) mandate.

According to the proposed rule, under Section 202 of the Clean Air Act, the EPA lacks statutory authority to prescribe standards for GHG emissions. EPA Administrator Lee Zeldin reaffirmed this statement at a July 29, 2025, conference. “Much has changed since the 2009 Endangerment Finding was issued, including new scientific and technological developments that warrant review,” the release said.

Encouraging the reinstating of “consumer choice”, the proposed changes would allow engine and vehicle manufacturers to no longer have future obligations for the measurement, control, and reporting of GHG emissions for any highway engine and vehicle.

According to the official filing, “no requisite technology for vehicle and engine emission control can address the global climate change concerns identified in the findings without risking greater harms to public health and welfare.”

However, the EPA intends to retain regulations for the criteria pollutants and air toxic measurement and standards, Corporate Average Fuel Economy testing, and associated fuel economy labeling requirements.

EPA to Hold Virtual Hearing on Emissions Proposal

The EPA will hold a virtual public hearing on August 19 and 20, 2025, on the proposal. An additional session will be held on August 21, 2025, if necessary.

All attendees, including those who do not intend to provide testimony, should email EPA-MobileSource-Hearings@epa.gov by August 12. 

Written comments may be submitted through September 15, 2025, to a-and-r-Docket@epa.gov. Include Docket ID No. EPA-HQ-OAR-2025-0194 in the subject line.

For more information, visit this link or see coverage from METRO’s sister site Heavy Duty Trucking.