On a brighter note, as our civilization slides further and further into oil and (to a lesser extent) natural gas decline, look for less chemical green lawns, less Turf Builder, and less use of lakeside cottages as homes.
Then too, phosphorus is getting somewhat pricey as the easy-to-mine supplies are being gobbled up by the world-wide farming machine.
I don't foresee the lake returning to lower phosphorus levels anytime soon, but said levels might not grow as fast as some people think either.
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