Methane has a short half life in the atmosphere though, so this in no way reduces the need to cut CO2.
So, every bit of methane in the atmosphere spends decades as a drastically more potent warming gas than C02 (25x more), and then becomes C02 to continue warming at a lower potency.
In each molecule of CO2:
* "C" is carbon. There is one (implied) carbon atom.
* "O" is oxygen. There are two oxygen atoms.