Green Building — a residential or commercial structure that is built in a manner that promotes energy conservation, uses environmentally friendly construction products in an efficient way, and creates a healthy place to live or work. Examples of green building techniques and processes include the use of geothermal heat pumps, rainwater collection, and radiant ceilings. Many of these technologies can be used for new or existing properties. The Leadership in Energy and Environmental Design (LEED) Green Building Rating System establishes criteria for "green buildings" in the construction industry.