I saw a show about using algae on PBS. If they can breed algae to work as fuel, algae farms could work double - using solar power to grow. What we could also try is refining methane - we have enough of it. I've never owned a large car, biggest one I had was a 6cyl 65 Mustang. I've mostly had 4cyl. Even my Tacoma is a 4. All of them were also stick. So I've never been a gas hog. I could drive the muscle cars nuts as none of them handled. You drove a Spitfire like a bike. Take the big cars road racing on extremely curvy roads and lose them.