> Methane breaks down to Co2 in the atmosphere on average in 9.6 years.
Despite which, over a 100 year period it has 25 times the warming impact as the CO2 it turns into.
> The problem we should be focusing on is fossil fuels.
Everyone should focus on whatever they know how to make a dent with, the "sustainable" emissions rate is 0.1% of the current rate which is essentially "we need to fix everything everywhere except for pick one of grassland or North Korea".