Biodegradable Circular Healthy & non polluting Home compostable Indoor air quality Natural (non-synthetic) Plastic free Recycle Renewable Some recommended reading Eternally Yours: Visions on Product Design Ed van Hinte Materials and the Environment, Eco-informed Material Choice Michael F. Ashby Cradle to Cradle: Remaking the Way We Make Things William McDonough & Michael Braungart Design for the Real World Victor Papanek