The document discusses four types of green countertop materials: recycled glass, concrete, recycled metal, and recycled paper. Recycled glass countertops are made from 85-100% recycled glass mixed with cement or resin. Concrete countertops are made from sand, rock, and cement allowing for customization. Recycled metal countertops are made from 60-70% post-consumer aluminum scrap. Recycled paper countertops are made from 100% post-consumer recycled cardboard or paper mixed with a phenolic resin. Each section provides details on cost, performance, manufacturing processes, maintenance requirements, and examples of companies that produce counters using these sustainable materials. A variety of other green count