Today, energy-efficient windows are key elements in the development of any environmentally responsible "green building." Architects, developers and building owners have additionally recognized that the meaning of "green" includes windows that promote a healthy environment for building occupants by combining daylighting, natural ventilation, noise and ultraviolet (UV) protection, as well as condensation and mold-resistance. These green fenestration attributes are promoted and certified by Leadership in Energy and Environmental Design (LEED), a rating system developed by the U.S. Green Building Council (USGBC) (see related article in the February 2005 USGlass, page 60).
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