Easily googleable numbers for total us electricity, about 475GW averaged over the year, about 1000 grams of CO2 per kWh for coal also pretty easily googleable (

Easily googleable numbers for total us electricity, about 475GW averaged over the year, about 1000 grams of CO2 per kWh for coal also pretty easily googleable (and can be derived with just basic facts like the heating value of coal of 35MJ/kg for nice anthracite, the fact that anthracite coal is nearly all carbon, the relative atomic mass of carbon and oxygen and therefore 12 parts coal will release around 44 parts CO2, the fact that a coal power plant thermodynamic efficiency is around 35%, etc). (44/12)/(35MJ/kg * 0.35) in grams/kWh = 1078.grams/kWh. https://www.google.com/search?q=(44%2F12)%2F(35MJ%2Fkg+*+0.35)+in+grams%2FkWh https://www.google.com/search?q=(44%2F12)%2F(35MJ%2Fkg+*+0.3... Global warming potential of CO2 over 100 year timeframe also googleable. These figures are all basic and pretty objective. (You May quibble about me choosing 100year timeframe vs 20 year, but that’s fine… it is still about the same order of magnitude.) More complicated to measure methane’s atmospheric lifetime and infrared absorption proportions, but nothing really controversial. The EIA website also shows this stuff.