A two-seater hydrogen-powered car has been revealed which has a top speed of 50mph and can travel over 240 miles without refueling.

The Riversimple open source car also emits less than 30 grams of carbon dioxide per kilometer, far less than current eco-cars.

Boffins from Oxford University helped create the car which will be leased to customers and costs just 15p per mile to run.

Being hydrogen-powered means that rather than exhaust fumes, the car emits only water ... but is currently incredibly hard to find somewhere to refuel.

Makers hope the cars will be on the roads by 2013, let's hope that by then you don't have to spend the entire 240 mile driving range looking for somewhere to top up.