Acti Roof is an innovative photocatalytic shingle that uses sunlight to clean the air of our cities from smog. The process of photocatalysis activated by the photocatalytic grit of Acti Roof acts on the nitrogen oxides, transforming them into harmless salts for people and the environment. Acti Roof guarantees high performance of this smog abatement, thus representing an effective solution to combat pollution in our cities.