EcoLogic Studio has invented an algae-based ‘cladding’ system, called PhotoSynthetica. Large panels (16.2 x 7 metres, or 53 x 23 feet) are attached to new, or old, buildings. They ‘suck in’ unfiltered and polluted air from the street that then rises up through the panels. The algae capture the CO2 and other pollutants and releases photosynthesized oxygen back into the street or the building interior. The ever-growing algae are later harvested to produce fertilisers, bio-plastics, cosmetics and more. The company claims that two square metres of PhotoSynthetica panels can absorb as much CO2 as a mature tree.