Under which act does this product contain air pollutants listed in Section 112(r)?

The correct choice is the Clean Air Act (CAA), which specifically addresses air quality and the regulation of air pollutants. Section 112(r) of the CAA focuses on the prevention of accidental releases of certain substances, including hazardous air pollutants. This section mandates that facilities handling these substances develop risk management plans to reduce the potential for harmful emissions that can adversely affect air quality and public health.

The other acts mentioned—Clean Water Act, Resource Conservation and Recovery Act, and Toxic Substances Control Act—focus on different environmental aspects. The Clean Water Act (CWA) regulates water pollution, the Resource Conservation and Recovery Act (RCRA) governs the disposal of solid and hazardous waste, and the Toxic Substances Control Act (TSCA) pertains to the regulation of chemical substances and mixtures. None of these acts address air pollutants specifically in the manner that the CAA does, particularly regarding the requirements outlined in Section 112(r). This reinforces the distinction of the Clean Air Act as the appropriate legislation concerning air pollutants.