The classical smog mainly contains:
Correct answer: D. Particulate matter and SO2
- A. Hydrocarbons only
- B. Hydrocarbons and SO2
- C. Hydrocarbons and N2O
- D. Particulate matter and SO2
Explanation
Classical, or sulfurous, smog is associated with coal burning and contains sulfur dioxide along with smoke and particulate matter. Hydrocarbons are more characteristic of photochemical smog.
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