Arcologies (building) (CTP1)

Arcologies is a city improvement in Civilization: Call to Power.
==Effect==
The Arcology radically alters urban architecture by offering near-limitless space - upward. Since overcrowding is decreased by 4, happiness ensues.
== Great Library entry ==
In the 22nd century Earth's citizens sought protection from growing toxicity: from blinding UV "pink outs" destabilized weather, biological contaminants, and fatal viruses and bacteria. The Arcology changed this—by offering protection from such threats to civilization. With mile-tall towers rising from the ashes of the failing metropolises, the Arcology provided people with safety, sunlight, and filtered air, taunting those trapped below with the sight of redemption.