The mean residence time of methane (CH₄) in atmosphere is ______?

ماحول میں میتھین کا اوسط رہائشی وقت ______ ہے؟

3-7 years

3-4 years

3-5 years

None of these

Methane (CH₄) is a stable greenhouse gas with a relatively long atmospheric lifetime.

Its mean residence time in the atmosphere is approximately 3 to 7 years before it reacts or breaks down.