The primary air quality statute in the United States is the:

Question

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The Clean Air Act (CAA), first passed in 1963 and amended several times since, is the primary federal law governing air pollution control in the United States. It sets national air quality standards, regulates emissions from sources like factories and vehicles, and mandates a variety of programs to reduce air pollution. The other choices listed are also environmental laws, but they do not specifically address air quality.

The Primary Air Quality Statute in the United States Is