Give an account of various sources and harmful effects of water pollution.

Various sources of water pollution are-

● Waste from industries into water bodies pollutes the water bodies as majority of the waste is non-biodegradable.

● Sewage waste which is mostly from houses is also directed into water bodies.

● Runoff water from farms carries along with it chemicals of fertilizers and pesticides thus again polluting the water bodies.

The harmful effects of water pollution include diseases in aquatic biota as well as living organisms. Minamata disease was observed in people of Japan who consumed water polluted with mercury. Itai-Itai disease was also seen in people of japan after consuming water polluted with cadmium. Infectious agents like bacteria, viruses and protozoans cause diseases like Thyphoid, Cholera and Diarrheoa etc. Aquatic organisms die when they are exposed to polluted water because it alters their body-processes.