The introduction of chemicals that can be harmful to the environment is mainly regulated by which agency?

The Environmental Protection Agency (EPA) is primarily responsible for regulating the introduction of chemicals that can be harmful to the environment. This includes overseeing the use, distribution, and disposal of hazardous substances and ensuring compliance with environmental laws aimed at protecting air, water, and land quality. The EPA implements regulations under various acts, such as the Clean Air Act and the Clean Water Act, which are designed to mitigate environmental risks associated with chemicals.

In contrast, other agencies mentioned have different focuses. For instance, the National Rifle Association (NRA) is focused on gun rights and related issues, while the Food and Drug Administration (FDA) is concerned with food safety and pharmaceuticals rather than environmental chemicals. The Tennessee Department of Agriculture (TDA) manages agricultural practices but is not specifically tasked with the overarching regulation of environmental chemicals. Thus, the choice of the EPA is accurate as it aligns directly with the goal of safeguarding the environment from harmful chemical exposure.