Transcript for Greenest Car on the Road Runs on Nothing But Air
Finally, tonight, here, everyone looking to save on gas, so when we heard of the car that runs on air, we just had to send our correspondent to check it out. Abc's nick schifrin tonight run bing on empty. Reporter: It may be hard to believe but this may be the car of the future. When I look in here, I see a garbage can. That's right. Reporter: I see a piece of wood and I see some random string. I mean, this is totally homemade, right? It is, yes. Reporter: Meet the inventor, peter, his car needs no gas, no batteries, only air. Have you ever seen "back to the future"? Oh, yes, yes. I need fuel! Oh, quick, get in the car. Reporter: What emissions will this car produce? It won't produce any emissions. Because it's only air we're using. We're not burning anything. Reporter: When you cool air to minus 300 degrees it becomes liquid. With antifreeze it turns back into gas powering the car's motor. So, fancy a spin? The rate is three miles with the tail wind. Top speed is only 30. Look, it's an early prototype. In 40 years of inventions in this garage, peter said that this one is his most important. He may just make the old gas guzzlers disappear into thin air. Nick shchifrin, abc news, london. You can hear it coming from
This transcript has been automatically generated and may not be 100% accurate.