Nuclear energy is more economical than other major energy sources. In the United States, nuclear energy has the lowest average electricity production cost of any major energy source. In 2005, electricity production costs per kilowatt-hour totaled: • 1.72 cents for nuclear • 2.21 cents for coal • 7.51 cents for natural gas • 8.09 cents for oil Exelon’s Nuclear production cost in 2005 was 1.3 cents per kilowatt-hour.