Hazardous materials are substances that can cause harm to the environment and living things when exposed to them. These materials can be toxic, flammable, corrosive, or reactive in nature. They pose a risk to human health, wildlife, and ecosystems if not handled, stored, or disposed of properly. Examples of hazardous materials include chemicals, radioactive substances, pesticides, and certain types of waste. It is important to identify and manage these materials carefully to prevent accidents, contamination, and negative impacts on the environment and living organisms.