The world has begun to focus on the merits of green building and the overall importance of sustaining the planet through creating environmentally efficient structures. In the United States, the U.S. Green Building Council (USGBC) is the nation’ foremost coalition of leaders from every sector of the building industry who came together in 1994 to advise on building environmentally responsible structures and guide developers through the processes. In 1996, they established the Leadership in Energy and Environmental Design (LEED) Green Building Rating System to provide third party validation of a building’s green design to classify the levels of sustainability and advise on the design, construction and operation of high performance green buildings. Today, the LEED system has become the benchmark for the design and construction of green buildings all over the world. The LEED point system measures the design and building process in five key areas; sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality.