Which act regulates the manufacture, use, and disposal of chemical substances?

The Toxic Substances Control Act (TSCA) of 1976 is designed to regulate the manufacture, use, and disposal of chemical substances. This act gives the Environmental Protection Agency (EPA) the authority to require reporting, record-keeping, and restrictions relating to chemical substances and mixtures. Its primary purpose is to ensure that chemicals are assessed for their potential risks to human health and the environment before they are introduced into the market.

Under TSCA, manufacturers must notify the EPA of their new chemical substances and demonstrate their safety. Additionally, the act empowers the EPA to regulate existing chemicals that pose an unreasonable risk, ensuring protective measures are in place for public health and environmental safety.

The other acts mentioned focus on different aspects of environmental protection. The Clean Air Act primarily addresses air quality and emissions, while the Resource Conservation and Recovery Act focuses on the management of hazardous and non-hazardous waste. The Superfund Act deals with the cleanup of contaminated sites, emphasizing the response to hazardous waste incidents rather than chemical substance regulation. Thus, the Toxic Substances Control Act is specifically tailored to oversee chemicals' lifecycle, making it the correct answer.