Nuclear. For sure, for a few reasons... 1. We don't have to wait 5 million years for plants to be compressed, and if we don't use up all the coal that means more diamonds later! :D 2. Nuclear power is a source that will never run out. (along with hydro, and wind power) 3. Nuclear power is healthier for the atmosphere so maybe this whole global warming idea will die down a bit. (ALSO along with hydro and wind power, except better! ) Nuclear, Hydro-power, and Wind-power are good ideas to keep around, for the places that have the capability to use hydro and wind, great, but not everyone can be powered off them unfortunately. :\