On February 12, 2026, the U.S. Environmental Protection Agency (EPA) issued a final rule rescinding the 2009 Greenhouse Gas Endangerment Finding and eliminating all federal greenhouse gas (GHG) emission standards for U.S. motor vehicles and engines. To justify this action, EPA has adopted an interpretation of the Clean Air […]
Clean Air Act
31 posts
[Here and at the end of this post, a template comment letter is linked for local governments to adapt for their own comments in the Endangerment Finding rule making process.] On August 1, 2025, the U.S. Environmental Protection Agency (EPA) published its proposed repeal of the “Endangerment Finding,” the scientific […]
On June 17, 2025, EPA published a proposed rule to either repeal entirely, or significantly revise, a rule issued in 2024 which set performance standards for fossil fuel-fired power plants to limit their greenhouse gas (GHG) emissions. This week, the Sabin Center filed three comment letters opposing the proposal. First, […]
Yesterday, January 21, 2025, the Sabin Center filed an amicus brief on behalf of the National League of Cities (NLC) and the U.S. Conference of Mayors (USCM) in support of the U.S. Environmental Protection Agency’s (EPA) 2024 greenhouse gas emissions standards for heavy-duty vehicles (the “HDV Rule”) that went into […]
On Friday, December 6, the Sabin Center filed an amicus brief on behalf of the National League of Cities and the U.S. Conference of Mayors in support of the U.S. Environmental Protection Agency (EPA) in Kentucky v. EPA as part of our ongoing amicus efforts to support strong federal climate […]
Today, the Sabin Center filed two amicus briefs—one on behalf of the National League of Cities and the U.S. Conference of Mayors, and a second on behalf of experts in carbon capture and storage (CCS) science and technology—in support of the U.S. Environmental Protection Agency (EPA) in West Virginia v. […]
A new Sabin Center white paper is linked here. In recent years, cities have become increasingly defined by e-commerce – the sprawling network of goods delivery from central warehouses to neighborhood distribution centers to residents’ front doors. This growing network of warehouses and the freight vehicles that serve them contribute […]
Following the 2007 landmark Supreme Court case Massachusetts v. EPA, the United States Environmental Protection Agency (EPA) has regulated greenhouse gas (GHG) emissions from motor vehicles under the Clean Air Act. These emissions standards were significantly loosened in the last year of the Trump Administration. In 2021 the Biden Administration […]