Pollution is the process of making the environment dirty and unsafe through human activities. Humans impact the environment in many direct and indirect ways that can decrease water quality, increase pollution and greenhouse gas emissions, and contribute to climate change. Air pollution occurs when substances not normally in the air are added, while water pollution is the contamination of water bodies from pollutants discharged without treatment. It is crucial to control pollution as it affects not only human health but also nature, plants, animals and the resources humans depend on for survival.