Which of the following is a non‑point source of water pollution?
Answer
Runoff from agricultural fields
The correct answer is Runoff from agricultural fields — State the chosen answer.
Step-by-step solution
- Recall definitions: point sources are identifiable single discharge points; non‑point sources are diffuse.
- Examine each option: (A) a specific plant outlet – point source; (B) runoff over a wide area – non‑point source; (C) a specific pipeline leak – point source; (D) factory effluent pipe – point source.
- Select the option that matches the non‑point source definition, which is B.
- State the chosen answer.
Common mistake: Choosing the sewage plant discharge because it is commonly discussed, forgetting that it is a defined point source.
Concept tested: Point vs non‑point water pollution sources
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