I really appreciated the new material in version 7.1 that detailed the structure of the city, such as the art and an…

I really appreciated the new material in version 7.1 that detailed the structure of the city, such as the art and an explanation of where all the food comes from. After reading v6, I was wondering how to feed a city that size in a world without sunlight, where anything outside city limits could be overrun by angry ghosts at any time. I am willing to roll with “don’t expect realism here” but I just wanted to have some basic idea, which I got in v7.1. Thanks.