Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes_______________?
Correct answer: B. Undesirable plant growth
- A. Foaming
- B. Undesirable plant growth
- C. Odour nuisances
- D. Turbidity
Explanation
Nitrogen and phosphorus act as nutrients and cause eutrophication, which stimulates excessive or undesirable aquatic plant and algal growth. Foaming, odour, and turbidity may follow, but they are secondary effects rather than the direct answer.
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