No. 6 fuel oil has a carbon content of 20 kg carbon per 109 j. if it is burned in a 40 percent efficient power plant, find the carbon emissions per kilowatt-hour of electricity produced, assuming all of the carbon in the fuel is released into the atmosphere. by law, new oil-fired power plant emissions are limited to 86 mg of so2 per million joules (mj) of thermal input and 130 mg nox/mj. estimate the maximum allowable so2 and nox emissions per kilowatt-hour.