I would like to make some comments about regulations, but more from the perspective of occupational health and safety. Several people here have mentioned the significant uncertainty surrounding the issue of toxicity. Indeed, as regards worker exposure in the work place, Mr. Petersen clearly stated that it is the Canadian workers who are potentially the most exposed to nanoparticles.
As for our knowledge on the exposure of these people, the degree of uncertainty is even greater in terms of toxicity. So I think that we really do need to adopt a precautionary approach in Canada. We have the scientific knowledge to design safe places of work. As regards occupational health and safety, if we wanted to change the regulations, it would probably be most important to require the labeling of all products containing nanoparticles. In this matter, companies that purchase such products and integrate them into their production line will know which nanoparticles they are dealing with, the dimensions of these nanoparticles, and will subsequently be able to implement occupational safety measures that will prevent, in the long term, Canadians from developing occupational diseases due to a lack of knowledge about the risks.