Chemical residues are leftover substances that remain on surfaces or in products after a chemical process or application. These residues can come from various sources, including agricultural practices, industrial manufacturing, and household cleaning products. They may pose risks to human health and the environment if not properly managed. In agriculture, for example, pesticides are often used to protect crops from pests, but traces of these chemicals can remain on fruits and vegetables. Regulatory agencies monitor these residues to ensure they are within safe limits for consumption. Proper washing and cooking can help reduce exposure to harmful residues.