It would mostly be biocides, toxic chemicals. The use of those is highly controlled. We've been looking at—we're advocating, anyway--and have taken a stab at all the likely species that haven't got to the Great Lakes yet but could, and what we'd want to use to murder them if and when they were discovered in a local area, and whether those chemicals were approved for use. Often chemicals are.... You know, if we decided that we want to use chemical X, and it's not approved for dumping into Great Lakes tributaries—
On June 6th, 2012. See this statement in context.