Energy and Climate Change and Environment, Food and Rural Affairs

I am grateful for that intervention because it allows me to tell the right hon. Gentleman that it will cost the public sector precisely nothing. The savings made on energy bills will be brought forward to pay for the costs. [Interruption.] Let me commend something called the McKinsey cost curve to the Secretary of State; I am surprised that he is not familiar with it. The McKinsey cost curve is well known to those of us familiar with the literature. What it shows is that some ways of improving energy efficiency and saving carbon actually save money at the same time—and that is where we should start. It seems to me that if the Secretary of State is aware of that, he is not able to translate it into policy.