Global air pollution and the lasting emissions by fossile fuels are threatening our health and our climate. Microalgae biofilms are living materials which actively trap and consume air pollutants. Based on this process, innovative living green-walls were designed as an natural and decorative solution for bad indoor air. Solagas goal is to go one step further and expand this concept to an outdoor-application that combats outdoor air pollution and is making cities greener by turning air pollutants into future clean bioenergy