Sewage water can be purified for recycling with the action of:
Correct answer: C. Micro-organisms
- A. Aquatic plants
- B. Penicillin
- C. Micro-organisms
- D. Fishes
Explanation
Micro-organisms decompose organic matter and help convert sewage pollutants into simpler, less harmful substances during biological wastewater treatment. Aquatic plants and fish may assist in some treatment systems but are not the primary agents.
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Practise Forest Ecology
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