Yes, you're quite right. Particulate matter smaller than or equal to 2.5 micrometres in diameter were put on the CEPA toxic list. The normal CEPA toxic process then took place, whereby the government had to take action within a certain number of years. The process to develop the new Canada-wide standard for ambient air for that particular substance is in place, with a deadline of 2010 for full implementation.
It was a good process. I think it was multi-stakeholder in nature. Therefore, those standards are not completely health protective; they're a compromise between what industry deemed to be achievable and what the health people said we needed.
Yes, it was successful to a point. But I think when you review the new standards for PM 2.5, they could well come down again.