“methane is 20 times more powerful than carbon dioxide as a greenhouse gas.”

– various sources

FACT: The best and most recent science indicates that methane is 33 times more powerful than carbon dioxide as a greenhouse gas, when considered over an integrated time period of 100 years following emission, and 105 times more powerful on an integrated 20 year time period.

The global warming potential or GWP, is a simple metric often used to assess how much more powerful a given greenhouse gas is when compared to carbon dioxide. Back in 1996, the Intergovernmental Panel on Climate Change estimated the GWP for methane as 21, considered over a 100-year time period following emission. As of 2007, the IPCC presented global warming potentials (GWP) for methane of 25 for a 100-year integrated time-frame and 72 for a 20-year integrated time frame after emission. Using a more recent model to better capture how methane interacts with other radiatively active substances, Shindell et al. in a 2009 paper in Science updated these factors to 33 and 105 respectively. These higher values reflect the best, most current science. The GWP for methane is less at the longer time scale simply because methane does not stay in the atmosphere for as long as carbon dioxide.

6 thoughts on ““methane is 20 times more powerful than carbon dioxide as a greenhouse gas.”

  1. […] warming since belching, farting livestock produce huge quantities of methane—a greenhouse gas 33 times more powerful than carbon dioxide. It’s obvious that the meat industry as we know it is […]

  2. […] from livestock are a much more harmful greenhouse gas than carbon dioxide in the atmosphere, contributing greatly to climate change.So this "cultured beef" as its creators are calling it seems to be a viable method of meat […]

  3. […] significativo sul surriscaldamento globale per via delle emissioni di metano—un gas-serra 33 volte più potente dell’anidride carbonica. È ovvio che l’industria della carne […]

  4. Highly descriptive blog, I enjoyed that bit. Will there be a part

  5. Wow that was unusual. I just wrote an extremely long comment but
    after I clicked submit my comment didn’t show up. Grrrr… well I’m not writing all that over
    again. Anyhow, just wanted to say excellent blog!

  6. lora lowe says:

    This is a no brain Emergency Stop Frack ; you /we are talking humanity here . This is insanity if you allow permits. You must Stop

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