LEED FEATURED MEMBERS Environmental Product Declarations The Leadership in Energy and Environmental Design Green Building Rating System Trim-Tex® Drywall Products The U.S. Green Building Council approved CEMCO® Fire Gasket™ ClarkDietrich® Proud To Be Green ® the LEED system in 1998. Since then, it has gone through several refinements to become the most widely accepted program of its kind in the United States today. The AWCI member manufacturers highlighted here have made a special commitment to green building LEED and to bringing that information to market through AWCI's media.