Environmental toxins refer to any substances that are present in the environment and have a negative impact on living organisms. These can include chemicals, heavy metals, pesticides, radiation or other pollutants that disrupt ecosystems, harm wildlife, and pose risks to human health. Exposure to environmental toxins can occur through various means such as ingestion of contaminated food or water, inhalation of polluted air, or contact with contaminated soil or surfaces. The effects of exposure to these substances can range from mild to severe and may include acute or chronic health problems, depending on the type and level of exposure.