I agree with the Cement Association. I think the measure, as you describe it, is an excellent one. The capacity to undertake the kind of technical assessment that would be required for this has really improved over time, so the ability of the Treasury Board to conduct those kinds of analyses would be very strongly enhanced.
The second point is that the financial models that would go into really understanding the financial economic impact of those choices have also improved. Energy efficiency is an interesting, separate, but parallel model. In some cases there is a high up-front cost with a revenue stream or a savings stream over time that most financial models traditionally have not been terribly good at monetizing, but that is now improving.