Your country doesn't have to achieve energy independence for you to. This shoe concept from Camper and Emili Ana Design would store the energy of your steps in a battery that could be used later to power a light or an iPod. Plus, they're kind of goofy looking. They're like the Prius of footwear.As we've pointed out before, the amounts of energy generated are comparatively small. But sources of energy like walking (or the sun) are free and don't require much in the way of infrastructure so keep these inventions coming, we say.From our friends at Nau.