A couple of years ago, I wrote about a car powered by compressed air.
(you can read the original articles here and here)
Well it seems that the idea is still going strong, and the French company that developed the technology was just in the news again. Here's a video from CNN.
And here's a link to the English version of the MDI Website for more information on what they are developing.
It would sure be nice to be able to get one of those cars here. Given a few solar panels, an inverter and compressor it would make running around town a whole lot cheaper.