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In which pollution zone of the river, growth of algae reappear?

(a) Zone of degradation

(b) Zone of recovery

(c) Zone of active decomposition

(d) Zone of clean water

I got this question in an online quiz.

This interesting question is from Pollution Zones in River in chapter Natural Methods of Wastewater Disposal of Environmental Engineering

1 Answer

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Best answer
Correct choice is (b) Zone of recovery

To elaborate: The growth of algae reappear in the zone of recovery.The growth of fungi decreases.

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