Regulatory Tracker Clean Car Rules — Corporate Average Fuel Economy Standards/Greenhouse Gas Standards The Trump EPA issued a proposal to rescind the Endangerment Finding and the GHG standards for light, medium, and heavy-duty vehicles. December 3, 2025
Regulatory Tracker The Social Cost of Greenhouse Gases (Carbon Dioxide, Methane, Nitrous Oxide) President Trump disbanded the interagency working group on the social cost of greenhouse gases, withdrew the working group’s guidance documents, and ordered agencies to use emissions estimates from the 2003 version of OMB’s Circular A-4. He also directed EPA to review how and whether the social cost of carbon should be used. July 29, 2025
Regulatory Tracker Corporate Average Fuel Economy Penalties In July 2025, Congress eliminated the Corporate Average Fuel Economy civil penalties, resetting penalties to $0.00. July 4, 2025
