We will consider the placement of the mini-sensors in order to optimise coverage and accuracy of the pollution generation process as well as study urban mobility patterns for the placement of micro-sensors. The project will assess low-cost (tens to hundreds of euros) air pollution sensors (micro) such as the Sensordrone mini (Vaisala AQT-410), and the high accuracy SMEAR stations that monitor over 1200 different pollutants every second.