I absolutely agree with you that we need to target the point sources. In fact, the City of Winnipeg's waste-water treatment plants have not been meeting their phosphorous discharge targets for a very long time and they need to. That absolutely needs to be addressed.
I guess what I'm arguing is that if we address those, it's still not going to be enough because 60% to 70% of the phosphorous that flows into Lake Winnipeg comes from non-point sources. If we want to address the problem, we also need to deal with those issues.
I totally agree that we need to deal with the point sources.