Hey, what about that car that runs on water? Hyde from "That 70's Show" almost ALWAYS mentions that car whenever the cast is in their "high circle".
There's a car that runs on vegetable oil. Some project or something. I know somebody who rode in it, says it smells bad but works fine.
There's a solar-powered truck. It was a project. It had a huge solar panel on the top. It was parked at the University of ********** (state name censored for my own protection) one day and I got a good look at it there.
Then there's hybrids.
Of course, we could all just get off our lazy asses and take a bike. I KNOW that some people can't because their job is too far away, but there are plenty of people who work near enough to their houses that they could just pedal the distance.
Final suggestion: One word: Carpooling. Explanation: Every person you take in your car, immediately eliminates one gas payment. Form a posse of car poolers, like 5, or more if you can fit them, and every time it's gas bill time, the person who pays will rotate. Everybody saves money.