Air pollution is not caused by:
Correct answer: A. Hydroelectric power station
- A. Hydroelectric power station
- B. Diesel engine
- C. Thermal power plant
- D. Pollen grain
Explanation
Hydroelectric stations generate electricity without combustion, so they do not normally release the combustion pollutants produced by thermal plants or diesel engines. Pollen grains can also act as natural airborne pollutants or allergens.
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