Answer 1st question......
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Answer:
EFFECT ON SEA LIFE
EFFECT ON DRINKING WATER
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Explanation:
The various constitute of domestic sewage is
They are
It contain impurities such as
suspended solids - sand ,salt , clay
colloidal material - fecal matter , bacteria , plastics and clothes fiber
Dissolved material - nitrate, phosphate , calcium , sodium , ammonia
Diseases causing microbes
Effects of sewage discharge in river :
1 . it causes water pollution
2 . it is harmful to river water living organisms
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