Influence of Vertical Gardens on the Air Quality of a City Historic Center

Vertical gardens in Quito's historic center significantly improve air quality, reducing ozone (O3) by up to 99%, nitrogen dioxide (NO2) by 80%, sulfur dioxide (SO2) by 83%, and particulate matter (PM2.5 and PM10) by up to 79% and 85%, respectively. However, the study reveals that poorly chosen plant species can increase ozone formation. Additionally, while vertical gardens are effective at removing larger particles (>4 µm), they are less efficient for smaller diameters when exposed to direct emissions from combustion engines. The research monitored air quality near four vertical gardens and assessed their retention capacity for gaseous emissions, providing insights into the potential of green infrastructure in urban areas with limited green space.

Ramirez, F., Chuquer, D., Vallejo Espinosa, A., & Davis, M. M. (2020). INFLUENCE OF VERTICAL GARDENS ON THE AIR QUALITY OF A CITY HISTORIC CENTER. Proceedings of International Structural Engineering and Construction, 7(1). https://doi.org/10.14455/isec.res.2020.7(1).aaw-05