Inventor's creation not just hot air
2 October 2012 Last updated at 15:44 BST
An inventor has developed a system that uses liquid air to power engines.
Peter Dearman may have found an answer to one of the planet's biggest problems - its future energy supply - and now some of the UK's top engineers are trying to see if the system could be used to store energy from wind farms on a large scale.
Roger Harrabin reports.