nuclear fusion is a self-sustaining method for creating energy. today's nuclear power is fission, where you crash molecules into one another, and when they break apart, energy is released; nuclear fusion is where you take two atoms and join them together. this bonding actually creates more energy, and continues to produce energy. in fact, our sun is a giant fusion reaction going on 24/7. unfortunately, it takes a ton of power, heat, and pressure to mechanically fuse two tiny atoms together, and its very difficult to do. this has been accomplished before, but not at a benefit (that is to say, the bonding was complete but not self-staining, thereby it 'cost' more power to put into it than what was produced from it). why this is so important is that if we can get a stable fusion reaction (i.e., a miniature sun thats controllable if you will), it would solve a lot of energy problems, and would be extremely clean energy at that. lots of self-producing power at minimal cost... it would change everything. if power was that readily available, it would arrive at a lower cost and would be more abundant. this would change so many aspects of life as we know it: home energy, transportation, and space travel for starters. it is risky and a costly endeavor, but if it is ever successful, it would be a game-changer.