A discussion of the Clean Air Act (CAA), its amendments, and significant caselaw pertaining to clean air regulation in the US ...

During the early 1970s, the air in many American cities was … brown. Pollution muddied clear skies and sickened people across ...

Every time the act was expanded or amended, really. The CAA mandates that EPA itself review the economic effects of the program periodically, and the agency has done so twice, quite painstakingly.

The US Clean Air Act (CAA) has improved air quality, but not equally for all people. According to a new study, while pollutant emissions have decreased over time, ...

On June 18, 2025, the Supreme Court decided Oklahoma v. EPA and EPA v. Calumet, a pair of cases that focus on the Clean Air ...

The Supreme Court on Wednesday issued two rulings on where certain challenges to actions taken by the Environmental Protection Agency under the Clean Air Act must be filed. In the […] ...

While the Republican-led U.S. House and Senate in the 115th Congress was mainly focused on reviewing, for modification or repeal, several environmental rules issued under the Clean Air Act (CAA ...

These numbers would likely be much higher if not for the Clean Air Act (CAA), which has proven both enormously popular and successful in saving hundreds of thousands of lives since its passage in ...

The U.S. Environmental Protection Agency (EPA) has finalized rulemaking originally proposed in 2016 to remove "emergency" affirmative defense provisions from its Clean Air Act (CAA) permitting ...