Social Cost of Carbon Recall that the social cost of carbon-based cost per kWh was calculated in this week's lesson. According to the calculations described in the lesson, the cost to society of the carbon emissions from electricity from coal and natural gas are as follows: Coal: $0.207/kWh if the SCC is $220/tonne and $0.035/kWh if it is $37/tonne. Natural gas: $0.121/kWh if the SCC is $220/tonne and $0.0203/kWh if it is $37/tonne. Keep in mind that these "costs" are not actually added to the cost of electricity in the U.S. What they do indicate is that if utilities were required to pay for the carbon emitted by coal and natural gas, this is what they would have to pay if it cost $220/tonne or $37/tonne. In other words, the cost of electricity would increase by the amounts indicated above for the source indicated (coal or natural gas) if the SCC were included. For example, let's say the price of coal-generated electricity is $0.10/kWh (10 cents per kilowatt hour). If the SCC were $220/tonne for coal, you would add $0.207 (20.7 cents) to each kWh, and so the final cost would be $0.10 + $0.207 = $0.327/kWh (32.7 cents