What defines a pesticide according to the US EPA?

The definition of a pesticide according to the US Environmental Protection Agency (EPA) emphasizes its primary function, which is to control or manage pests. This encompasses a wide range of substances that are designed to eliminate or mitigate the presence of organisms considered undesirable or harmful, including insects, weeds, fungi, and more.

This definition is significant because it underlines the importance of the intended use of the material. Pesticides are not just any substances, but specifically formulated products intended for pest control. Understanding this helps ensure that individuals who work with or handle these substances are aware of their responsibilities regarding safe usage, application methods, and potential environmental impacts.

The other options presented, such as harmful substances found in nature, materials causing soil erosion, or general household cleaners, do not accurately reflect the scope and focused application of pesticides. While some harmful substances or household cleaners might have pest control properties, they do not qualify as pesticides unless they are explicitly used for that purpose. This distinction is crucial for both regulatory compliance and environmental stewardship.