Arcologies (advance) (CTP1)

Arcologies is an advance in Civilization: Call to Power.
==Summary==
The culmination of the Construction Advances, Arcologies make the hive city a reality. Capable of supporting several hundred million people in a single city, the Arcology reverses urban sprawl and substitutes the urban wall.
== Great Library entry ==
The Arcology developed in the early 25th century as citizens sought protection from toxicity due to ozone loss and climatic instability. Capable of housing tens of millions, the Arcology provided a warm, stable, temperate environment whose only cost was a loss of personal freedom.