Purdue student engineers have designed a street-legal solar-powered commuter car that needs no gas. It can be plugged in to charge, but the solar panels generate so much electricity the car has enough juice to power an air conditioner and additional accessories. http://www.purdue.edu/newsroom/general/2011/110422M-PesynaSolar.htmlPurdueUniversity > 2200 mpg solar car needs no gas