If I could just complete my answer on the question about two barrels in for one barrel out, that of course is quite possible in a centrally planned economy. Indeed, there are many examples in the Soviet Union where the production in the centrally planned economy actually wound up destroying value so that the output was worth less than the inputs. But of course in a market-based system, it's not possible for that to happen.
I have no comment on the use of the term “responsible development”. I think you'd have to ask the people who have used it. The reality is that the term “sustainable development” appears in the mandate given by Parliament to the department when it was created. I think I'm fairly safe in coming to Parliament and talking about “sustainable development” until that's changed by Parliament.