That's true, but unlike atmospheric CO2, atmospheric methane is relatively short-lived. Not to diminish the effect of methane, which while short-lived, is a ver

That's true, but unlike atmospheric CO2, atmospheric methane is relatively short-lived. Not to diminish the effect of methane, which while short-lived, is a very potent greenhouse gas. And not to diminish the various feedback effects in the global circulation system that are likely to create a self-sustaining pattern that will long outlast the originating atmospheric gases.