Question

as bacteria, virus,
protozoa and we
river water when sewage is dumpe
2. Agricultural waste: The excess wa
mixes with the water bodies and t
contains many dissolved fertilisers
with the river water and contamin
fertilisers causes an excessive grow
plants. These cover the surface of
and dissolved oxygen. Thus, the w
of fish and other aquatic proanin
llution​

Answer 1

Answer:

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Answer 2

Answer:

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