San Francisco — Pure Wood Solutions is a green panelized building system made 100 percent of wood. According to the company, it uses no synthetic products, no glues, metals, or plastics, no products bearing formaldehyde; only sustainable small pole lumber is used for each wall, floor or ceiling component.  Additionally, the wood layers require no additional insulation. As a factory-controlled item, it produces very little waste, aids in indoor air quality, and is recyclable.