fuel,co2coeffmm Subbituminous Coal,2.77 Natural Gas,2.40 Lignite,2.04 Bituminous Coal,2.77 Wood,1.63 Heavy Fuel Oil,2.84 Petroleum Coke,3.31 Diesel,3.20 Methane,2.80 Light Fuel Oil,2.60 Propane,2.77