This document summarizes a presentation on green building construction materials. It discusses how green building ensures waste is minimized during construction. Some materials used in green construction include wool bricks, sustainable concrete made from wood chips or steel slag, solar tiles that absorb energy from the sun, and paper insulation made from recycled materials. Merits of green building include efficient technologies, easier maintenance, return on investment, improved indoor air quality and energy and water efficiency. Demerits include higher initial costs, availability of materials, needing more time to construct, and requiring skilled workers.