During the early 1970s, the air in many American cities was … brown. Pollution muddied clear skies and sickened people across the country. The Clean Air Act helped change that. But the law's ...

The Clean Air Act (CAA) has been a cornerstone of public health protection in the United States for over half a century. Its stringent regulations on emissions from power plants have resulted in ...

Under the federal Clean Air Act (CAA), California holds a unique position that allows it to request waivers from the U.S. Environmental Protection Agency to enforce stricter vehicle emissions ...

Over the course of the last 15 years, the U.S. Environmental Protection Agency (EPA) has developed a suite of regulations under the Clean Air Act (CAA) built upon EPA’s finding – originally ...