6 ms·

Seven years. And after that you get carbon dioxide (& water)

• Retric 10y ago
  Source? Wikipedia says: "an estimated lifetime of 8.9±0.6 years in the atmosphere." Which suggests a half life of 1/2 that.
  • xapata 10y ago
    A half-life describes an asymptotic curve. You don't just divide a "lifetime" by 2.
    • Retric 10y ago
      1 + 1/2 + 1/4 + 1/8 + 1/16... = 2 so it's not that far off as an approximation but yea 1/LN(2) = 1.44 so the low number is 5 point something years and the high is 6 point something years.