Well, the newer numbers that we achieved, and factoring in the regulations.... We know, for example, that the tailpipe emissions will achieve a reduction of a significant amount of megatonnage because fully a quarter of Canada's greenhouse gas emissions are in the transportation sector. We know that those regulations and the science behind them will get down a certain number of tonnes. We know that the new regulations for coal-fired electricity generation, by achieving new operating performance standards, will reduce the megatonnage from that sector. As we regulate each sector, we can anticipate where we'll be in 2020.
On November 19th, 2012. See this statement in context.