This car is propelled by compressed air, which is pretty cool, as it produces no emissions other than cold air. Of course energy has to be used to compress the air in the first place, a point to which the show's producers readily concede. But then they quickly jump the shark, declaring that maybe that energy could be produced using the compressed air-powered generator that the car's inventors have created. Okay, so the car creates power using compressed air, power which in turn would supposedly be used to create...compressed air!!! And voila, perpetual motion. Okay, so where in there does the power to create the actual motion of the car come in?
The series has been quite interesting thus far, but the show's producers have decided they want to get the audience really excited by discarding the laws of physics and then declaring that all our energy problems could be solved in the near future. Allow me to point out that at no time did the inventors of the compressed air car jump to this ridiculous conclusion. They are real scientists, who understand real science. For the Discovery Channel to air such an assertion warrants a major loss of credibility.