Inspired by bioluminescence in jellyfish, the Mini Cooper pods would use a chemical reaction created when salt and fresh water mix in the presence of certain bacteria, creating hydrogen fuel. This process not only generates energy, but the water intake/outtake system can also serve as the propulsion method for the craft. Tiny “cleaner” robots, inspired by many types of fish that do this in real life, keep the Mini clean by nibbling algae from its surfaces.
The Committee to Nuke Elysium 