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 risks to human health and the environment. Exposure to chemical contaminants can lead to various health issues, including respiratory problems, skin irritations, and long-term diseases. It is essential to monitor and manage these substances to protect ecosystems and public health. Regulatory agencies often set limits on acceptable levels of contaminants to minimize their impact.