The Clean Air Act (CAA) is now 55 years old—and shows its age. That's not a critique of its legacy. The law, in conjunction with innovation and private investment in environmental improvement, has ...

The U.S. Department of Justice on Wednesday announced it's pausing criminal prosecutions of diesel "delete" procedures under ...

The U.S. Supreme Court issued a pair of decisions in EPA v. Calumet Shreveport Refining and Oklahoma v. EPA on June 18, 2025, resolving two related circuit splits regarding proper venue for ...

On January 2, 2026, the D.C. Circuit declined to rehear en banc its prior order restoring the Clean Air Act’s (CAA) Title V affirmative defense ...

A discussion of the Clean Air Act (CAA), its amendments, and significant caselaw pertaining to clean air regulation in the US. The second Trump administration is taking steps to roll back various ...

Sen. Mike Lee, R-Utah, introduced the Fair Air Enforcement Act on Thursday with a goal to “protect Americans from lawfare by climate extremists.” The act would amend Section 304 of the 1970 Clean Air ...

The Clean Air Act’s outdated framework is hindering progress. New bills aim to modernize it with reforms aligned to today’s economic, environmental, and scientific realities. The Clean Air Act (CAA) ...

A June white paper from the Texas Public Policy Foundation (TPPF) has found that carbon dioxide (CO 2) emissions from the U.S. power sector do not meet the threshold set under the Clean Air Act (CAA) ...

Environmental Protection Agency Administrator Lee Zeldin testifies before the House Committee on Energy and Commerce Subcommittee on Environment in the Rayburn House Office Building on May 20, 2025 in ...

The Clean Air Act’s outdated framework is hindering progress. New bills aim to modernize it with reforms aligned to today’s economic, environmental, and scientific realities. The Clean Air Act (CAA) ...