While it is known that air pollutants are mostly driven by emission from a diversity of sources, such as traffic , residential and industrial combustion (Bing there is also a significant con-15 tribution driven by local and global meteorological factors such as temperature , wind , pressure and humidity for, e.g., PM 10 and PM 2.5 (particulate matter with aerodynamic diameters <10 µm and <2.5 µm, respectively) but also for pollutants such as NO 2 and carbon fractions .