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Hydrogen


Hydrogen

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The fact remains that fuel cells are expensive, as are the in-car hydrogen storage tanks, which have to be able to withstand enormous pressures so enough hydrogen can be carried to give the car a workable range.

The infrastructure to store and deliver hydrogen requires significant investments in plant, transport and retail facilities. California has established a refuelling network for hydrogen powered vehicles.

Then there's the question of just how we extract the most common element on earth so we can use it in its pure form.

"There's no point in hydrogen-powered fuel cells unless the result is low emissions," David Lamb said.

Hydrogen can be produced by electrolysis - splitting water into its component elements using electricity - but the electricity used to do it also has to be produced by low or zero emissions technology if we are to gain an overall environmental benefit.

More about the future of fuel

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