Adobe Bamboo Cellulose insulation Cob Composite wood (when made from reclaimed hardwood sawdust and reclaimed or recycled plastic) Compressed earth block Cordwood Cork Hemp Insulating concrete forms Lime render Linoleum Lumber from Forest Stewardship Council approved sources Natural Rubber Natural fiber (coir, wool, jute, etc.) Organic cotton insulation Papercrete Rammed earth Reclaimed stone Reclaimed brick Recycled metal Recycled concrete Recycled paper Soy-based adhesive Soy insulation Straw Bale Structural insulated panel Wood