I should add, what we are faced here with, which leads to anoxic conditions, the N2 fixation that leads into blue green algae blooms (cyanbacteria) that really and truly disrupt are lakes and can be harmful (and fatal) to our fish is using natural swamps and wetlands to help us. In Canada, we still have the space to do this. That is only reasonable solution.
It's not a reasonable expectation that anthropogenic sources (like farms and agriculture) would be able to limit the Nitrogen and Phosphorus to levels where this problem would "just go away".
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