Chemical contaminants are harmful substances that can pollute air, water, and soil. They often come from industrial processes, agricultural practices, or household products. Common examples include heavy metals like lead and mercury, pesticides, and solvents. These contaminants can pose serious health risks to humans, animals, and the environment. Exposure to chemical contaminants can lead to various health issues, including respiratory problems, skin irritations, and long-term diseases such as cancer. Regulatory agencies, like the Environmental Protection Agency (EPA), monitor and set limits on these substances to protect public health and the environment. Reducing the use of harmful chemicals is essential for a safer ecosystem.