An Icelandic team has invented a radical device which can produce electricity from water.

The Thermator could play a major role in the non-polluting economies of the future.

It works by something called the thermo-electric effect, which scientists have known about for many years.

But while thermo-electric generators have mainly been used to power spacecraft, such as Voyager and Galileo using heat from radioactive materials, the Thermator is firmly rooted on Earth and works on nothing more than hot water.