GodThingFormerly
A Different Kind of Asshole
The idea of underground industry and transport sounds OK, but commerce?
Why not commerce? Many parts of the world have shopping malls that were built partially or wholly underground. As for the "financial services" industry, well, it's not like those vampiric parasites have a pressing need for access to natural sunlight, do they?

I believe in green (energy efficient) architecture and engineering, utilization of new building materials and technologies, all that stuff... Or maybe I've been watching too much "Megastrustures"...
An arcology is still an arcology even if 9/10ths of it is placed below the surface. Beyond that, the heating/cooling energy and external weatherization maintenance costs would only be a fraction of those required for an aboveground structure of comparable size, particularly in regions with crappy climates (i.e., Florida).
I'll check out those books, though... They sound interesting.
Take a look at Loretta Hall's website as well.
SLR
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