The 25x number is already accounting for the fact that methane doesn't stick around as long. It's based on 100-year GWP calculations [1]. If you look at shorter

The 25x number is already accounting for the fact that methane doesn't stick around as long. It's based on 100-year GWP calculations [1]. If you look at shorter timescales methane is relatively much worse. [1] https://www.epa.gov/ghgemissions/understanding-global-warming-potentials https://www.epa.gov/ghgemissions/understanding-global-warmin...