A pollutant is any substance that contaminates the environment, making it harmful to living organisms and ecosystems. Pollutants can be found in air, water, and soil, and they can originate from various sources, including industrial activities, vehicle emissions, and agricultural practices. Common examples of pollutants include carbon monoxide, heavy metals, and pesticides. Pollutants can have significant effects on health and the environment. For instance, air pollutants can lead to respiratory issues in humans and animals, while water pollutants can harm aquatic life and disrupt ecosystems. Reducing pollutants is essential for promoting a healthier planet and ensuring the well-being of all living things.