Right now Neil Cavuto is on Fox News. There was just a segment where Pat Boone was talking about "air cars" and I just have to say something. It is an interesting concept, like electric cars but again just like them entirely misses the point.
Basically this car is based around a very strong tank filled with very compressed air. You are not going to be able to get an adapter and just blow real hard into this thing, I would wager a bicycle pump would not work either. You are going to need some sort of a real heavy compressor to fill this thing up. Just like the 'pollution free' electric cars this compressor will run on electricity. Guess where most electricity comes from, coal (yeah I know there is 'clean coal' but lets not get too complicated) and huge diesel generators.
This is like saying that a hot casserole a neighbor brings over is 'cooking free' because it was in the neighbors oven, not yours. I am not saying that we shouldn't seek more efficient vehicles. Between sheer cost, our national security and peak oil sooner or later (likely sooner) the day of people driving their fossil fuel jobs from a small farm or the suburbs are going to end. In order to avoid anything but a massive and probably negative shift in our life patterns we need to keep independent transportation affordable. However lets be honest about it. If we produce power from a combination of wind and nuclear power it would be very close to 'pollution free' but a cord going into a wall that leads to a coal plant or even better a diesel generator it is not pollution free.