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Climate Change Bill [Lords]

I hope that my right hon. Friend has not devalued the compliment that he threw across the Floor of the House; heaven knows what he will say when another Member seeks to intervene. The question at issue has been whether technology in aviation and shipping can proceed at a pace to enable the costs to be kept reasonably low and therefore to allow us to pick up the benefits of a low carbon technology without extra cost. Is my right hon. Friend aware that the leading estimates of the improvement needed in carbon productivity are that it needs to increase fourfold over the next 40 years—that is, that the average of the past 15 years, which is 1.5 per cent. per annum, needs to increase to about 6 per cent. per annum if we are to get anywhere near meeting the 80 per cent. target? Will he speculate on whether it is plausible that a fourfold increase can be achieved?