The iSCAPE Bologna team, including the University of Bologna and ARPAE, successfully carried out the air quality measurement campaign in selected city areas. Last summer we announced the launch of the monitoring campaign: the activities went on from August 7th to September 29th in via Marconi, which is a canyon without trees, and via Laura Bassi Veratti, a canyon with trees. The research focused on those two areas because of the peculiarities of street canyons within urban environments, where atmospheric dynamics and turbulence are crucial for pollutants transport and removal. The measurement included air quality, dynamics and thermal atmospheric variables inside and above two urban street canyons, with and without trees. The effects of the urban green is currently under investigation to assess the impacts of trees on air quality at pedestrian level.