Maybe Kinetic energy generators attached on the wheels are something ? If we put a thin small tube in the VERY center of the wheel (where the rotation is fastest) filled with some generators. I'll try to draw a drawing sometime to be clearer with the generators positions and amounts. We can't create kinetic energy without something movin'. So i thought a little solar panel on the top of the car for ONLY creating enough power to start the kinetic energy proccess would be something. And maybe we could even add all the green methods of creating energy into the car... like windmills or water when it rains etc. Toghether they are strong.. :P. I don't really have an idea on making energy though, but if this is the solution, it's worth sharing it with someone who might know how to.