Italian architectural practice Nemesi & Partners will be covering the Palazzo Italia building in Milan with a smog-purifying facade. The facade will be crafted out of 2,204 tons of special air-purifying cement, and will stretch over 9,000 square meters.
The outdoor surface and some parts of the interior will be made out of 'i.active Biodynamic' cement panels. When in contact with direct sunlight, this material captures pollutants and converts them into inert salts, thereby helping to reduce smog. The smog-purifying cement itself is highly sustainable, being made from recycled materials such as marble scraps.
The Palazzo Italia will also be equipped with a photovoltaic glass rooftop to generate solar energy during the day. The building will be a central feature of the Milan Expo 2015, but the smog-purifying facade will remain long after the Expo is over.