The document discusses various types of construction materials, focusing on natural wood and engineered wood. It describes hardwoods and softwoods, providing examples of common types of wood like oak, maple, pine and cedar. It then discusses how overexploitation of natural wood led to the development of engineered wood products like plywood, blockboard, veneers, laminates, particle board, medium density fiberboard, and high density fiberboard. These composite materials are manufactured by binding wood fibers, particles or veneers together under heat and pressure.