Chemical toxins are harmful substances that can cause damage to living organisms. They can be found in various forms, including heavy metals like lead and mercury, as well as synthetic chemicals used in pesticides and industrial processes. Exposure to these toxins can lead to serious health issues, including respiratory problems, neurological damage, and even cancer. These toxins can enter the body through different routes, such as inhalation, ingestion, or skin contact. Once inside, they can disrupt normal biological functions, leading to toxic effects. Understanding the sources and effects of chemical toxins is crucial for public health and safety.