Pollution is the presence of environmental substances that are harmful or toxic to living things. There are many different types of pollution, including air pollution, water pollution, soil pollution, and noise pollution. Pollution can have various negative impacts on the environment, including damaging ecosystems, disrupting food chains, and harming wildlife. It can also seriously affect human health, including respiratory problems, heart disease, and cancer. Human activities, such as the burning of fossil fuels, industrial processes, and the improper disposal of waste often cause pollution. Governments and organizations around the world are working to reduce pollution and protect the environment through the implementation of regulations, the promotion of sustainable practices, and the development of clean technologies.