The Leadership in Energy and Environmental Design (LEED) green building certification system is a framework for improving the environmental performance of buildings, homes, and communities. LEED is developed and administered by the U.S. Green Building Council (USGBC). LEED certification can help building owners and operators to save money, improve their environmental performance, and attract and retain tenants and customers. It can also help to build a more sustainable future for our planet. LEED is the most widely used green building certification system in the world. There are over 100,000 LEED-certified buildings in over 160 countries.