I'd have thought with the amount of coffee grounds, leftover food and human manure from so many people, one could have turned their surrounding areas into a sel

I'd have thought with the amount of coffee grounds, leftover food and human manure from so many people, one could have turned their surrounding areas into a self sustaining green belt (with a little help from atmospheric water generation https://en.m.wikipedia.org/wiki/Atmospheric_water_generator#:~:text=An%20atmospheric%20water%20generator%20(AWG,to%20render%20the%20water%20potable https://en.m.wikipedia.org/wiki/Atmospheric_water_generator#....