The Clean Air Act's National Ambient Air Quality Standards (NAAQS) and New Source Review (NSR) permitting work in conjunction to improve ambient air quality in the United States. However, all previous studies of the NAAQS ignore this joint nature and focus solely on the effects of NAAQS...

In the US, much of the authority to administer the Clean Air Act (CAA) is delegated to indi-vidual states. States are responsible primarily for the administration of the National Ambient Air Quality Standards (NAAQS), which impose technological and other requirements on stationary emission...