What about using air as a fuel to run your car? Twelve years ago Guy Negre, a French engineer, built two of these Air Cars and he and his son drove them around Paris as taxicabs to test their research.

The car's oil (a quart of vegetable) only needs to be changed every 30,000 miles or so. It can reach a speed of 68 mph and has a road coverage of roughly 124 miles (more than double the road coverage of an electric car). To refill, you connect the car to a mains supply for 3 to 4 hours (it costs very little to run the compressor, nothing like recharging an electric car) or pull into a regular fuel station with an air pump that will do the job for you in 2 minutes.

Apparently, they're offering manufacturing licences and going into full production shortly.

"When men yield up the privilege of thinking, the last shadow of liberty quits the horizon." Thomas Paine