Pollution is not caused by:
Correct answer: D. Hydroelectric power plant
- A. Thermal power plant
- B. Automobile
- C. Radioactive power plant
- D. Hydroelectric power plant
Explanation
In the conventional comparison used in pollution MCQs, hydroelectric power produces no direct smoke or combustion emissions during electricity generation. Thermal plants emit air pollutants, automobiles emit exhaust, and radioactive plants can produce radioactive or thermal pollution.
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