Biofuels, while not as harmful as fossil fuels, still emit tremendous amounts of carbon dioxide, and are not a long-term solution. Modern nuclear power produces low amounts of carbon dioxide, but significant amounts of radioactive waste, which isn't good for anybody! The Sun bombards the Earth with visible light, infrared heat and ultraviolet radiation continuously, providing us with a constant and tremendous source of energy. If we could create this same energy source here on Earth, we would have virtually limitless, pollution-free energy. So not only is it possible to build your own star -- however briefly -- but this may also be the long-term solution to our energy problems!