Which of the following pollutant gases is not produced both naturally and as a…
2017
Which of the following pollutant gases is not produced both naturally and as a result of industrial activity ?
Answer: A. Chlorofluoro carbons — Methane, nitrous oxide, and carbon dioxide all have significant natural sources (e.g., wetlands, denitrification, respiration) in addition to industrial ones.…
- A.
Chlorofluoro carbons
- B.
Nitrous oxide
- C.
Methane
- D.
Carbon dioxide
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Correct answer: A
Methane, nitrous oxide, and carbon dioxide all have significant natural sources (e.g., wetlands, denitrification, respiration) in addition to industrial ones. Chlorofluorocarbons (CFCs) are synthetic compounds; they do not occur naturally and were produced only by industrial activity for uses like refrigerants.
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