Fusion is the most hopeful (not to be confused with fission!), it takes the atoms of hydrogen and helium (an abundant potential energy source) which when combined by laser-superheated compaction of atoms as a 'kick-start', generate an enormous release of energy and chain reaction (or something like that :), problem is they have not worked out a way to sustain the reaction and getting it started requires a -HUGE- amount of power.
Theory goes, once the reaction starts there is enough energy there to sustain itself for a long period while harvesting enough energy to supply our needs (kind of like the way the sun works). But even that would not be perpetual as its constantly giving a little of its energy away (just like the sun) so the reaction will eventually die.
Good luck with the quest though as the earth is like a big battery (with a little help from the sun of course). It is filled with potential energy but that energy is finite, humans have already exceeded biocapacity and are taking way more energy than the 'biosphere' can supply with existing technologies. (that is if its to remain habitable) .
Just dont get your hopes up on finding a way to -create- energy thats all ;P
Theory goes, once the reaction starts there is enough energy there to sustain itself for a long period while harvesting enough energy to supply our needs (kind of like the way the sun works). But even that would not be perpetual as its constantly giving a little of its energy away (just like the sun) so the reaction will eventually die.
Good luck with the quest though as the earth is like a big battery (with a little help from the sun of course). It is filled with potential energy but that energy is finite, humans have already exceeded biocapacity and are taking way more energy than the 'biosphere' can supply with existing technologies. (that is if its to remain habitable) .
Just dont get your hopes up on finding a way to -create- energy thats all ;P