Junjun Xiang is a PhD candidate in the School of Geography, Earth and Environmental Sciences. He focuses on urban mobility and air pollutants from the transportation sector, leveraging telematics data in his research. His work examines the impact of various meteorological and social events on urban air pollution levels. Additionally, his research encompasses greenhouse gas emissions on an urban scale. Junjun also evaluates the variations in air pollution levels before and after the establishment of the Clean Air Zone (CAZ) in Birmingham.