What law regulates chlorofluorocarbons (CFCs) like Freon?

The correct answer is the Clean Air Act, which regulates chlorofluorocarbons (CFCs) such as Freon. This law was established to control air pollution on a national level and is particularly significant for its role in addressing substances that deplete the ozone layer. CFCs are known to be harmful to the ozone layer, which protects the Earth from the sun's harmful ultraviolet radiation. The Clean Air Act has been amended multiple times to include provisions for reducing emissions of ozone-depleting substances, including a phase-out of the production and consumption of CFCs.

The other options relate to different areas of environmental protection but do not specifically target the regulation of CFCs. The Environmental Protection Act broadly establishes the framework for environmental protection, while the Air Quality Act primarily focuses on maintaining and improving air quality standards. The Safe Drinking Water Act is concerned with ensuring safe drinking water quality and does not cover air pollutants like CFCs. Thus, the Clean Air Act is specifically designed to address the concerns associated with chlorofluorocarbons and similar substances.