Pollution can be found in the ground, water, and air, and it can cause irreversible damage to the planet. This title examines the various kinds of pollution as well as how pollutants can affect the health of species, humans, and ecosystems. It also looks at steps being taken to regulate pollutants entering the environment, ways in which activists have contributed to stopping pollution, and how everyday people can get involved. Features include a glossary, references, websites, source notes, and an index.