Question

Which is the third zone of pollution in the river?

(a) Zone of recovery

(b) Zone of degradation

(c) Zone of clean water

(d) Zone of active decomposition

This question was posed to me in a job interview.

Asked question is from Pollution Zones in River topic in division Natural Methods of Wastewater Disposal of Environmental Engineering

Answer 1

Correct option is (a) Zone of recovery

Explanation: The zone of recovery is the third zone of pollution in the river where river tries to recover the polluted water through the self purification process.