Fauna & Flora
130 billion people live on Lair. There are several large districts for forests, parks, lakes, and even an ocean district, each maintained and monitored to insure they remain in balance against the needs of the city districts. There is no native wildlife on Lair anymore. The trees and plant life are pollinated artificially and the needs of the vegetation have been taken over by machines or synthetics.
The only natural resources left are minimal, and even those are fairly well mined out. Lair is a fully utilized world, and there is no room to grow or expand for it. It is, for all intents and purposes, dead, but it remains the beating heart of the Empire. Economically, all trade passes through Lair, and so it will also never die.