I have updated the Greenhouse Gas version in the previous post to include a figure for how the comparison of methane versus carbon dioxide warming by weight over counts methane molecules by about a factor of three. Instead of the warming of methane over carbon dioxide being a factor of 34 by weight, it is reduced to a factor of 12 by molecule, which is important in referring to energy production and fugitive methane leakage.
I also include a figure that illustrates the calculation of what the amount of leakage of methane or the breakeven point would be if old 33% efficient coal plants were replaced by 60% efficient combined cycle gas turbine natural gas plants. The breakeven point would be 20% leakage of fugitive methane compared to methane used for power production. This is compared to the previous breakeven of 3% calculated using the incorrect comparison by weight, and replacing 33% efficient coal plants only by 33% efficient natural gas plants.