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As amended in the Standing Committee, further considered.

Following what my right hon. Friend the Member for Bromley and Chislehurst (Mr. Forth) said in responding to the Minister, may I develop the point that I made on an intervention, which seemed to raise some eyebrows on the Front Bench and certainly did so on the Liberal Democrat Benches? We welcome to the House this morning the new Liberal Democrat spokesman on this subject, the hon. Member for Eastleigh (Chris Huhne). He made some body movements and gestures when I suggested that one of the by-products of fuel cell technology is water vapour. I do not know whether he disputes that, but I have a note here that is relevant. I will not trouble the House with all the detail of it, and I know that my right hon. Friend the Member for West Dorset (Mr. Letwin) will probably not need to be taught about this because he knows it already, but it says:"““What is a fuel cell? Fuel cells are devices that produce electrical power. They operate by using the chemical properties of hydrogen and oxygen to create useable electrical current, heat and water vapour. In some ways they can be considered to be a continuously fuelled battery, although unlike a battery they do not store energy; they convert it from one form to another.””" The significant expression there is ““water vapour””, because if pure hydrogen is used as a fuel for these fuel cells, the only outputs are electricity, heat and water vapour.