Inside world's first hydrogen-powered production car
14 September 2010 Last updated at 11:43 BST
The world's first hydrogen-powered production car has arrived in the UK for the first time.
The Honda Clarity is not on sale yet, and may not be for many years.
But does the technology behind the car - which emits just water and has a range of more than 200 miles - represent the future of motoring?
Transport correspondent Richard Scott has been looking around the vehicle.