Lower Levels

Megacities such as Imperial City often have a ginormous population. Thus, in order to preserve space - and power - these cities expanded downward, leading to dozens of levels below ground. The poor people of the Lower Levels seldom see the light of the sun. The "Lower Levels" refer to the levels deeper in the ground. The lower you go, the worse the living conditions are. At the farthest levels, people must wear some sort of breathing apparatus and regularly take vitamin supplements to survive.