moped runs on air.
I had my brief glimpse into this Earth-friendly future when I heard about Jem Stansfield, a former shepherd now turned inventor who has designed an air powered bike. All Stansfield did was connect a few air canisters that are normally used by firefighters to a normal Puch moped. I suppose that sounds like an easy DIY operation, but Stansfield is a true innovator in creating one of the most environmentally sound vehicles today.
Of course, this moped can only reach a top speed of 18 mph, and can only travel for about seven minutes per canister. The canisters for this mode of transportation are quite expensive at $6 a tank at the most.