The Construction & Demolition Recycling Association (CDRA) promotes and defends the environmentally sound recycling of the more than 500 million tons of recoverable construction and demolition (C&D) materials that are generated in the United States annually. These materials include aggregates such as concrete, asphalt, asphalt shingles, gypsum wallboard, wood, and metals. The CDRA represents a diverse group of member companies and agencies from the many C&D materials recycling disciplines and industry specialties active in the United States and other countries.