How is letting of sewage into water bodies cause fish mortality? – InterviewSolution

1.	How is letting of sewage into water bodies cause fish mortality?
Answer» As the sewage is discharged into water bodies, there is an increase in the biodegradable organic matter. The micro organisms multiply fast with the increase in organic matter, which Is used as its substrate for them. These microbes consume a lot of oxygen and there is a sharp decline in the dissolved oxygen content of the water body, this leads to fish mortality.

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