Groupwork + Romeo Srl Using stone to replace high-carbon heavy steel and concrete superstructures will become more and more common, reducing embodied CO2 by up to 95%. Its structural abilities and processes are millennia old, yet what to do with the stone waste that amounts to 50% of a quarry’s output? Our research, begun over ten years ago by Ateliers Romeo and joined by Groupwork offers designers the opportunity to bind, fold, and layer materials to form a composite of structure, thermal envelope, and external and internal finish of any efficient form. By virtue of being a waste material, it will be a future low-cost and low-CO2 aid, helping to dramatically drop the construction industry’s contribution to atmospheric CO2, currently estimated at more than 30%.