To improve air quality, cities could install roadside sensors to detect the presence of high-polluting vehicles, suggest Australian researchers. The idea would be to combine this monitoring system with a program to repair vehicles that are heavy emitters. Researchers at the University of Technology Sydney, the study authors analyzed data obtained from pollution radars — on road remote sensing technology, set up by the Hong Kong Environmental Protection Department. This remote monitoring program began in September 2014. Professor John Zhou from the University of Technology Sydney (UTS), an…