There are two reasons, Mr. Fast.
The first is that if you look at the environmental burden of disease in Canada, which I mentioned at the outset, leading experts estimate that between 9,000 and 15,000 premature deaths per year in Canada are the result of exposure to air pollution. I think that the statistics you're mentioning about Canada being a world leader, in part that's because we're a huge country. If you take an average air quality assessment for Canada, we come out looking pretty rosy. The problem is that we have—not just Sarnia, but northern Alberta, northwestern British Columbia—many areas in Canada where there are significant air quality problems, and I would include some of the major cities as well.
What national air quality standards would do for us would be to provide a level playing field for all Canadians, and a system whereby if a particular region or city was in non-attainment, there would be a mandatory remedial process. There would have to be actions taken to bring air quality up to that national standard in those regions. That's the way the system works in the European Union and the United States, as well as Australia.