Which one of the following does not affect the quality of water?

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Untreated sewage

Industrial effluents

Dams

Pesticides and insecticides

answer is C.

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Detailed Solution

Dams do not affect the quality of water. Untreated sewage, Industrial affluents, Pesticides and insecticides lead to water pollution and affect the quality of water, but dams do not affect the quality of water. Water pollution means causing pollution in water bodies. Water sources such as rivers, lakes, oceans, groundwater, and aquifers become contaminated with industrial and agricultural effluents, which causes water pollution. Water pollution is caused by contaminated water from households, businesses, power plants, etc. They are typically so filthy that they are unhealthy for both people and animals.

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