EPA Proposes Rescinding Endangerment Finding at Indiana Truck Dealership: Zeldin Calls It 'Largest Deregulatory Action in History'

On July 29, 2025, EPA Administrator Lee Zeldin announced a formal proposal to rescind the 2009 Endangerment Finding – the scientific and legal determination that greenhouse gas emissions endanger public health and welfare – at a commercial truck dealership in Indianapolis. Zeldin chose the Kenworth of Indianapolis location, a Palmer Trucks facility on the city’s east side, to stage the announcement, framing the rollback as a victory for the trucking industry and calling it the “largest deregulatory action in the history of the United States.”

The proposal advanced three core arguments: (1) that Clean Air Act Section 202(a) does not authorize climate-related vehicle emission standards; (2) that the 2009 Finding unreasonably analyzed the scientific record; and (3) that no vehicle technology can meaningfully address climate change without imposing greater economic harm. The EPA claimed rescission would save $54 billion annually by eliminating what it characterized as burdensome regulations, and specifically targeted what Zeldin called the Biden administration’s “electric vehicle mandate” – the tailpipe emission standards that would have required automakers to increase EV production.

The proposal targeted both the Endangerment Finding itself and all subsequent federal greenhouse gas emission standards for vehicles and engines, covering model years 2012 through 2027 and beyond. If finalized, it would eliminate the legal foundation for all EPA greenhouse gas regulations under the Clean Air Act – not just vehicle standards but potentially power plant rules, methane regulations, and industrial emission standards.

The choice of venue was telling: a truck dealership rather than a scientific institution, signaling that the decision was driven by industry demands rather than scientific review. The D.C. Circuit Court of Appeals had upheld the Endangerment Finding in 2023, and the Supreme Court had refused to hear a challenge, meaning the scientific basis for the finding had been repeatedly affirmed by courts. Environmental organizations, public health groups, and climate scientists warned that the scientific evidence supporting climate danger had only strengthened since 2009, providing no factual basis for reversal. The American Public Health Association noted the proposal could lead to tens of thousands of additional deaths from heat, floods, and air pollution over the following decades.

The public comment period ran through September 21, 2025, with virtual hearings scheduled for August 19-21. The proposal was finalized as a repeal on February 12, 2026, triggering immediate legal challenges from environmental groups and state attorneys general.