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Write a short note on water pollution....

Write a short note on water pollution.

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Water pollution is any undesirable change in the physical chemical or biological properties of water that may affect the human beings and aquatic species.
There are various types of water pollutants such as :
(i) Domestic sewage
(ii) Industrial waste
(iii) Agricultural waste
The various effects of water pollution are :
(i) Biomagnification
(ii) Eutrophication
(iii) Increase in Biochemical Oxygen Demand (BOD)
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