Roma-based Nemesi & Partners has designed a 13,000 square meter “urban forest” that will serve as the Italian Pavilion at the 2015 Milan Expo. Enveloped within an intricate, branch-like skin, the six-story lattice structure will be made from 900 panels of “i.active BIODYNAMIC” cement that will “capture” air pollutants and convert them into inert salts.