… (NO 2 ), and particles with diameter no more than 10µm (PM 10 ). The second part of my project is to link traffic … other countries. The concentrations of BC, NO 2 , and PM 10 for the cases were all higher than the concentrations for … is relatively large. The associations of NO 2 and PM 10 with CHD were marginally significant. Each 10 µg/ m 3 …