The reason I said I think we've learned a lot is that the kinds of substances we were dealing with initially were obscure substances. In the past, CEPA 1988 was dealing with substances that were difficult to pronounce and unknown, and the purpose of the risk assessment phase was really to gather the science and the evidence on whether or not these substances were being properly managed and prevented from entering into the environment in such a manner as to cause harm to the environment or a danger human health.
The reason I say that with road salt we learned is that road salt was one of the early substances we tackled dealing with something people knew and understood. Intuitively, they had their own judgment of how or whether it causes harm.
That means there needs to be more care for communicating what the science tells us about it, and then where we're going in terms of managing the risk. I think that's the part that we've learned and tried to do better, as we've dealt with some other substances that are more of a common nature.