"There is something fundamentally unethical about using drinking water to flush the toilet. It goes deeper than the impracticality of treating a limited resource as waste. It is a paradoxical dichotomy: man sees his waste as the utmost filth which merits removal via water clean enough to drink. To me, it suggests an unhealthy relationship.
In my research I came across an anecdote from Joseph Jenkins, author of The Humanure Handbook, a somewhat serious firsthand account of composting human waste at his home in Pennsylvania.
After releasing his book’s first edition, he got a call from a nun, who asked him to give a talk at the convent about ‘humanure.’
When he asked why the nuns chose him, the answer was this:..."