Define water pollution, point source pollution, and non-point-source pollution
Water pollution(oraquatic pollution) is the contamination of, usually as a result of human activities, in such a manner that negatively affects its legitimate uses.:6Water pollution reduces the ability of the body of water to provide thethat it would otherwise provide. Water bodies include for example,,,,and. Water pollution results whenare introduced into these water bodies. In addition to damage to many, water pollution can also lead tofor people.Water pollution traditionally is attributed to four sources, which provide the organization of this article:
Water pollution can also be classified aspollution (for example lakes, streams, estuaries, and parts of the ocean in) orpollution. Sources of water pollution are eitheror. Point sources have one identifiable cause, such as aor a. Non-point sources are more diffuse, such as.Pollution is the result of the cumulative effect over time. Supplying cleanis an important ecosystem service provided by some freshwater systems, but approximately 785 million people in the world do not have access to clean drinking water because of pollution.