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I have heard that it's unusually nutrient rich - maybe not toxins, but human shit definitely causes algal blooms.


Dumping ANY manure into a body of water causes algal blooms. Fecal matter concentrates nutrients. This has happened with modern megafarms, when flooding overflows their manure pits.


Wouldn't be the first time humans tried to use human manure as fertilizer. It always ended quite shitty (for humans).


And human urine




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