Ivan Illich's book (now open ...

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Ivan Illich's book (now open source on line), H2O and the Waters of Forgetfulness, describes and gives references for the economics of the agricultural produce from 'night soil' use in Paris, France in the 19th Century. Apparently, the city literally exported produce. The economics were such that there was significant resistance to providing the public sewerage infrastructure which did away with the night soil.