Biology, asked by kiara10, 1 year ago

Explain why discharge of untreated sewage into rivers and seas is harmful

Answers

Answered by giya5
11
discharge of untreated sewage into rivers and seas is harmful because they pollute water or water bodies and decreases the level of fresh water.
Answered by Anonymous
11
discharge of untreated sewage into rivers and seas is harmful in following ways-
1-the water of river or pond or lake is polluted.
2-it causes diseases like typhoid,cholera,etc.
3-mosquitoes breed in dirty water.and when it sits on our food,our food gets contaminated, which makes us sick.
4-mosquitoes also spread diseases like malaria.

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