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fine particulate matter (PM2.5), particulate matter (PM10), nitrogen dioxide (NO2), ozone (O3), sulphur dioxide (SO2)
fine particulate matter (PM2.5), particulate matter (PM10), nitrogen dioxide (NO2), ozone (O3), sulphur dioxide (SO2), nitric oxide (NO), nitrogen oxides as nitrogen dioxide (NOx as NO2), carbon monoxide (CO)