Pittsburgh, PA and Washington, DC
Environmental Alert
(by Gina Buchman, Gary Steinbauer, Christina Puhnaty and Alex Graf)
On February 12, 2026, the U.S. EPA announced a rule finalizing EPA’s repeal of the Obama administration’s 2009 Endangerment Finding as well as all federal greenhouse gas emissions standards for vehicles and engines of model years 2012 and beyond (Final Rule). Administrator Zeldin originally announced the agency’s intent to do so in March of 2025 as part of the agency’s “31 Historic Actions to Power the Great American Comeback” announcement, and a proposed rule was issued in August of 2025. See 90 Fed. Reg. 36288 (Aug. 1, 2025). The Final Rule has not yet been published in the Federal Register, but a pre-publication version of the Final Rule is available on EPA’s website.
The “endangerment finding” refers to the finding EPA made in 2009 prior to setting emissions standards for new motor vehicles and engines pursuant to Section 202(a)(1) of the Clean Air Act, which requires EPA to regulate “the emission of any air pollutant from any class or classes of new motor vehicles or new motor vehicle engines, which . . . cause, or contribute to, air pollution which may reasonably be anticipated to endanger public health or welfare.” In 2009, EPA concluded that “the current and projected concentrations of the six key well-mixed greenhouse gases—carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride—in the atmosphere threaten the public health and welfare of current and future generations.” 74 Fed. Reg. 66496 (Dec. 15, 2009). …