Which greenhouse gas has maximum average residence time in the atmosphere?
- A. CFC
- B. CH_{4}
- C. N_{2}O ✓
- D. Water vapour
Correct Answer: C. N_{2}O
Explanation
Among the specific gases listed, Nitrous oxide (N_{2}O) has a very long average atmospheric residence time of approximately 114 years, which is significantly longer than methane (CH_{4}) and water vapor.
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