Soon, we won’t have to whore our national security interests out just to get oil from Saudi Arabia , natural gas from Canada , or electricity from Electrijikistan . We’ll be able to power our cars for free, using nothing but a liter of Sprite and ten minutes! Urea , the compound in our urine, may be a more effective fuel source than water in powering fuel-cell cars , which have proved resistant to consumers because we like Escalades and because fuel-cell cars kind of suck, in terms of r