http://richearthinstitute.org/
https://humanurehandbook.com/
Half or more of the population is taking prescription drugs so their excrements are no good for fertilizer.
That would be problematic. Not long ago they were saying we should drink urine and the other day I read about lab meat, a DIY kit called ouroboros (snake eating its tail). It’s a steak made from a swab of your cheek, they claim it’s not technically cannibalism...