Of all the energy sources discussed here, Nuclear Fission Power is clearly the lowest-cost form of non-greenhouse energy production when used at World best-practice level. The second-generation reactors currently operating like this consistently produce low-cost electricity with virtually no greenhouse gas emissions at high reliability. The French decision to go all-Nuclear has paid-off handsomely as has Sweden substantial use of Nuclear Energy. Furthermore, Denmark (which has avoided nuclear power but strongly supports environmental responsibility) has Greenhouse Gas emissions per capita which are substantially greater than both France and Sweden.