These building products and materials are not only made from naturethey also give back to it. (Courtesy BamCore)DuoShearBamCoreDuoShear is a bamboo-eucalyptus-wood hybrid and carbon-negative framing system suitable for low-rise residential and commercial structures up to 5 stories. Delivered as a kit of parts, the system is palletized and sequentially numbered with a map and nail pattern for easy installation.(Courtesy TimberHP)TimberBattTimberHPSoftwood chips left over from sustainably harvested and FSC-certified Maine forests are mixed with borate to create sustainable and sound-dampening wood insulation. Its renewable, stores carbon, and protects against fire, mold, and insects. (Courtesy Prometheus)ProZero Bio-based CementPrometheusDeveloped in collaboration with SOM, this bio-based cement is made from cultivated algae and is three times stronger than typical concrete and 15 to 20 percent lighter. The low-carbon material relies on a bioreactor in place of a kiln.(Courtesy Hempitecture)HempcreteHempitectureHemp and a lime-based binder combine to create a biocomposite that acts as insulation between frame members, reducing racking while internal framing supports structural loads. The materials used to create Hempcrete absorb carbon dioxide and are offset within the life cycle of an industrial hemp plant.