Atmospheric particulate matter (PM) emission from overpasses is serious. To optimize the solution of planting design in the overpass, it is essential to understand the plant's ability to capture PM. In this study, leaf samples were collected from 11 plant species commonly existing in five overpass greening areas in Changsha, China. The PM retention per unit leaf area (M(leaf)), PM retention on a unit greening land (M(land)), and leaf surface microstructure were measured and analyzed. Results showed that the M(leaf) of Ophiopogon japonicus (1.59...
