- A All of them are secondary air pollutants that contribute to global warming.
- B All of them are primary air pollutants that contribute to acid deposition.
- C All are air pollutants formed by combustion of fossil fuels.
- D All of them are air pollutants that result in respiratory diseases in humans.
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Answer:
B
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All of them are primary air pollutants that contribute to acid deposition.
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