NotAYakk said: More friendly per person. Not more friendly per km^2.
Districts represtent km^2.
Not necessarily.... districs are an abstract of an entity providing space and/or workspace for a set number of pops. This can be either a 1 story building or 100 story building which can then be of variable height based on the average height of the pop species. Some of these could even be subterranean or underwater.