A team of scientists and researchers at Purdue have developed a fully functional Mr. Fusion. (For those who have no idea what I'm talking about, go rent Back to the Future II asap.) This tactical biorefinery can munch up food, paper and plastic garbage and turn it into energy. This machine was commissioned for the U.S. military (so don't expect it on top of your DeLorean anytime soon) for use in the field to create energy. It is roughly the size of a small moving van, so there is still some work that needs to be done to make it a little more functional. This biorefinery can supposedly produce 90-percent more energy than it consumes, which is a damn impressive feat. Next step: flying cars, hoverboards and self-drying clothing.