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ARTICLE · 22 AUGUST 2025

EPA Officially Proposes Revocation Of Endangerment Finding

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The EPA recently published its heavily anticipated proposal to revoke its 2009 determination under section 202(a) of the Clean Air Act that GHG "cause, or contribute to, air pollution which may reasonably be anticipated to endanger public health or welfare."

United StatesEnvironment
Kenneth J. Markowitz
Kenneth J. Markowitz
Stacey H. Mitchell
Stacey H. Mitchell
Samantha Z. Purdy
Samantha Z. Purdy
Brecken Aubrey Petty
Brecken Aubrey Petty
Charles Edward Smith
Charles Edward Smith
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The Environmental Protection Agency (EPA) recently published its heavily anticipated proposal to revoke its 2009 determination under section 202(a) of the Clean Air Act (CAA) that greenhouse gases (GHG) "cause, or contribute to, air pollution which may reasonably be anticipated to endanger public health or welfare." That "endangerment finding" forms the legal basis for EPA to regulate GHG emissions from "any class or classes of new motor vehicles or new motor vehicle engines"—cars, trucks, buses, etc. This proposal, which is part of the holistic effort by the current administration to deregulate GHGs,1 was touted by EPA Administrator Lee Zeldin as "the largest deregulatory action in the history of America."

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