If you are wondering what green buildings are, let me tell you what green buildings are in this article. Well, green buildings use the natural resources efficiently as building materials and use eco-friendly ways. These buildings must have advanced technologies that can sense the human body temperature and adjust the room temperature accordingly, thus, saving energy. Using LED & CFL lights can help in saving energy, and must be installed in the green buildings. Air based flushing system can help avoid the use of water, thus conserving the natural resource.