I've written about other vehicles that run on sustainable, alternative fuel sources and also about the use of waste to power everything from cars to homes, but the Toilet Bike Neo is the best of both worlds.
Why? It's a one-of-a-kind motorcycle designed by Japanese commode (a.k.a.: toilet) manufacturer TOTO that doesn't run on just any ol' biofuel. It is powered by human waste biogas. To top it all off, instead of a seat, this three-wheeler sports a toilet for easy fueling — and comfort for the rider, of course — and a tank that sits behind the rider. Plus, it has LED lights that play scrolling messages, it plays music and even talks (insert "shitty" Knight Rider pun here).