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I think methane lasts for less than a decade in the atmosphere before it's broken down into C02, so considering this has been likely going on for a long time, r

• gruez 5y ago
  >I think methane lasts for less than a decade in the atmosphere before it's broken down into C02 Source? Google info box says: >Methane is a powerful greenhouses gas with a 100-year global warming potential 28-34 times that of CO2. Measured over a 20-year period, that ratio grows to 84-86 times.
  • soperj 5y ago
    >Methane, by contrast, is mostly removed from the atmosphere by chemical reaction, persisting for about 12 years. Thus although methane is a potent greenhouse gas, its effect is relatively short-lived. I was off slightly, but not an order of magnitude. https://www.theguardian.com/environment/2012/jan/16/greenhouse-gases-remain-air https://www.theguardian.com/environment/2012/jan/16/greenhou...