Civil Engineering - UPSC Civil Service Exam Questions - Discussion

49. 

What is the zone where fish life might tend to progressively dwindle when waste water, is discharged into a river, called ?

[A]. zone of degradation
[B]. zone of active decomporsition
[C]. zone of mixing
[D]. zone of recovery

Answer: Option B

Explanation:

No answer description available for this question.

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