Actually, it's interesting. I had another slide in here, but I had 10 minutes.... That slide would have demonstrated it.
There are eight sites that are multi-trophic, which means growing seaweeds and mussels next to salmon farms with the expectation that the mussels will gobble up the waste and the seaweed will soak up the nitrogens, the nutrients. The reality is that it doesn't work.
The slide I would have shown you is about a site in Deer Island that is a multi-trophic site. The sulphide levels in the sediments before the site became an IMTA site were around 3,000. When it became a multi-trophic site, the sulphide levels shot up another 1,000 to about 4,000. It doesn't work for lots of reasons, which I've...there's lots of science around that. In fact, the key proponents of integrated multi-trophic aquaculture have written that it just doesn't do what they expected it would do, because of the scale of the issue and because mussels actually don't feed on particulate organic carbon. They actually have food preferences. They're not just garburators. They actually have specific food preferences. What they thought would happen isn't really happening. There's lots of evidence for that.