http://www.hempcar.org/ I would consider writting my G1 if I knew where I can get my hands on the such awsomeness
Very cool...looks like a Mercedes station wagon. But I bet a car like that would probably go for a pretty penny now....anyway, very cool little ride!
hemp is great and all... but not necessery to run a biodiesel car. It is pretty easy to get ahold of a car of such sorts and the oil may be slightly hard to come across, but you can find it at most restaraunts (veggie oil from deep fryers). You can buy conversion kits to turn your diesel wagon into a biodiesel car. It is a renewable form or energy and much healthier for the air than regular diesel. I highly recommend it if convenience is less of an issue to you than energy resources.