We've been focusing on the virtual elimination discussion today around releases, which is generally associated with the substances already in use. I just want to remind members that the virtual elimination concept, or the prevention of releases of persistent biocumulative toxic substances also applies to the new substances program. So that's the prevention, and it's been in place since 1994.
We also used the same concept in environmental assessments and a number of other policies related to contaminated sites and other things like that. So this policy drives more than dealing with the releases.
I know you're also familiar with the categorization exercise, and one of the purposes of that exercise was to identify what further substances we should be focusing on to prevent--