MCQ
How is sewage water purified for recycling?
- ABy the action of fish.
- BBy the action of microorganisms.
- ✓By the action of fuels.
- DBy the action of non$-$biodegradable chemicals.
✓
Answer
Correct option: C.
By the action of fuels.
Sewage water is purified for recycling by the action of non$-$biodegradable chemicals.
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