The half life is 12 years. So after 24 there's still a quarter, after 36 still a... | Hacker News

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Scarblac 11 months ago | parent | context | favorite | on: Why are there so many methane satellites?

The half life is 12 years.

So after 24 there's still a quarter, after 36 still an eighth, etc. It's worse than CO2 for a very long time, and then it is CO2.

codeflo 11 months ago [–]

I just looked it up to be sure. It seems like the mean lifetime is 12 years, which is the figure one uses for calculations. The half life is shorter.

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