To my knowledge, it happened when Mr. Clinton appeared before the United Nations. I believe he announced a 5% drop. He could have announced 25%, but he knew full well that the American senate would not adopt it. Obviously it was easy for him to set out a figure.
In Canada on the other hand, when the Prime Minister takes a position on a treaty, it is adopted. By definition he controls the cabinet. If there is a cabinet, there has been a vote of confidence. In this case there has been no vote of confidence before Parliament.
The issues really revolve around oil sands, transport and industry. With respect to oil sands, the solution is nuclear energy. We need to have enough energy for the extraction process. There is also carbon capture and storage. It remains to be seen whether or not we are advanced enough from a technological standpoint for that to make any sense.
Moreover, the industrial sector is responsible for 43% of the emissions in Canada. We are going to have to crack down harder. I assume that would happen in time, at least I hope so. Finally, there is automobile transport. You are talking about people's habits, at home or elsewhere. Changing our lifestyle habits is not easy, but that is the key issue. For my part, not only would I like to see public awareness-raising campaigns, but I would also like to see tax instruments used to help change people's behaviours.