The organization known as the Leadership in Energy and Environmental Design (LEED) has a goal of setting up a program of giving green building certification which promotes and hastens worldwide acceptance of sustainable green building and development practices. This is done through a set of rating systems that identify projects which employ policies for better environment and health performance. LEED is a third-party certification program which provides standard for the design, construction and operation of high-performance green buildings. LEED encourages a total-building approach to sustainability by distinguishing performance in five key areas of human and environmental health.