Much thought was put into the sustainability features of the Shanghai Tower. Double layers of glass were employed to allow sunlight to enter the building and control heat absorption. Special turbines on the roof help generate energy for the building and gray water is recycled and put to use elsewhere in the building. In order to provide everything residents and guests could possibly require, every section inside Shanghai Tower features its own atrium, with restaurants and sky gardens that enable individuals to work and play without ever having to stake a single step out of the skyscraper.