How is that any better an explanation than arcologies, which are already in prelim development stages?
Sorry for the double post.
Arcologies make sense in a way. But why in Iowa? Is land really that scarce in the 23rd century?
Could they be left over from an earlier period? If we meld Trek history, maybe they were some of the first structures built after people recovered from WWIII (TNG version). Many parts of the world may still have been uninhabitable at that point. In Kirk's time, maybe the world has been thoroughly detoxed, and with colonies all over the place, it's possible the arcologies are anachronistic to Kirk's time. Still used, though.
Well, there are two areas where the arcologies are going under planning and development, and that is in Japan and the american south west...
Japan is because of space constraints, but the problem is it's hard to get past design phase because of geological concerns.
The american south west because it's the home of the guy who developed the idea, and also because the land is cheap and there is plenty of open space.
I think the american midwest would be perfect for such developments, it's close to the farms thus cutting down on transportation of those goods, and it's geologically stable, flat, and relatively easy to dig down to bed rock... also, it's far from the current urban/suburban spans of the few megalopolises that already exist, which is good because of the space needed to set them up and also because of the price of land in those areas.