describe any five causes of Water Pollution.
Answers
1. seawage and waste water
2.dumping
3.industrial waste
4.oil pollution
5.acid rain
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Causes of Water pollution are as follows :-
▶️Human diseases.
▶️Disturbance in Ecological balance. ▶️Removal of desirable substances from water bodies.
▶️Biological oxygen demand (BOD) indicates the quality of waste water.
▫️BOD - BOD refers to amount of dissolved oxygen needed by bacteria in decomposing the organism waste present in water.
▶️Effect of thermal pollution or change in temperature.
▶️Destruction of useful microorganisms.
▶️Eutrophication : It is the process in which dissolved oxygen in water gets reduced due to excessive growth of algae as a result of extra loading of nutrients in the water.
▶️Presence of sewage and fertilizers (
nitrates and phosphates) in polluted water provide a lot of nutrients to the algea present in water bodies, resulting excessive growth of algae known as ALGALBLOOM.
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