I'm not sure if energy is where this material is best spent. For sure, it seems like we treat human excrement as, well, waste now, and that's an absurd & farcic

I'm not sure if energy is where this material is best spent. For sure, it seems like we treat human excrement as, well, waste now, and that's an absurd & farcical shame, given how much energy and/or nutrients are in. Given the limited supply of things like phosphates (and other core nutrients) the world is facing, I feel like nutrients is where we need to explore/invest. I picked up a biography a bit back on some westerner who'd been bumbling about in Japan a long time ago, & the westerners who eventually found them. I'm sorry, I just was browsing in a library; there's a photo of the book I have somewhere but I'm not sure what it was right now & can't remember specifics. But there were some really interesting materials. Landlords had rights to the human waste & would sell it as a major source of income. You got charged less rent if you had more people they could collect manure from. Energy is all fine & good, but recouping the bio-potential seems capital.