bio-based material
Commercial or industrial products (other than food or feed) that are composed in whole, or in significant part, of biological products, renewable agricultural materials (including plant, animal, and marine materials), or forestry materials. For the purposes of LEED, this excludes leather and other animal hides.
First 10 image search results of bio-based material architecture
Jargon of the day: negative/positive space
See: Solid/Void
