Vertical Greening Systems for Pollutants Reduction

Abstract Applying vertical greening systems (VGS) on both new and existing buildings can offer multiple environmental benefits, including air pollutants’ mitigation and air quality improvement. The direct effects of VGS on air quality are mainly related to the absorption of fine dust particles and the uptake of gaseous pollutants. Indirect effects, e.g., cooling capacity and related reduction of energy demand and gas emissions connected, can be relevant as well. VGS can therefore reduce adverse health impacts from long term exposure to air pollutants at the same time improving the local urban environment. Selecting the most suitable plant species is of key importance, especially considering particulate matter collecting capacity. Attention should be also paid in low allergenicity, low cost of maintenance, and climatic suitability.