The mean residence time of methane (CH4) in atmosphere is:
Correct answer: D. 3-7 days
- A. 1-2 years
- B. 3-4 years
- C. 3-5 years
- D. 3-7 days
Explanation
Another natural source of methane is the anaerobic decomposition of organic matter by bacteria in water sediments and in soils. Methane has a mean residence time of about 3 -7 years in the atmosphere.
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