A few years ago a French inventor came up with the technology for an automobile that runs on compressed air! It generates no pollution at all, costs about $2 per fill up, runs 125 miles on a tank, and can go up to 70 mph. It looks like a micro-mini van, with a sliding door. Clark loves the idea. But so far, even though they're bringing 6000 of them to India, no one wants to bring them to the U.S. So until they're available here, Clark is considering getting a "GX", a car from Honda that runs on natural gas, the kind of gas that heats your home. It creates almost no pollution, costs about $1.20 a gallon, and about 97% of the gas supply would be from domestic sources. Honda is only bringing about 1200 in per year (to New York and California only) to see if there's a market for them. To fill up, you install your own gas station at your house and plug into it overnight. On road trips you'd have to do your homework to find out where natural gas filling stations would be. But Clark is really excited about these cars, and would even consider breaking his own rule of avoiding costly "new" technology in order to be an early adopter.