@leashless We thought we would have warp drive before thinking machines, however we have thinking machines well before a moon colony. Besides Bank's "Culture", nothing has addressed humans not being the main protagonist.
@leashless@bklyn_newton The incinerating propane toilet made by Cinderella is 180 g propane per flush. That is ~1 kg CO2/flush, not including the wax paper liner.
I think your sustainable number is somewhere between 5 and 10 kg CO2 per person per day.
Perfect is the enemy of better.
@leashless@bklyn_newton To do that at scale, you'll need batteries to reduce the electrical load. It's a few kWh per flush. You'll still need to carry out your piss, and carry in your water which wouldn't be a problem vs existing rents.