traffic emission 12 atmospheric pollution 10 carbon monoxide 10 Air pollution 8 Carbon monoxide 8 urban atmosphere 8 Argentina 6 air quality 6 priority journal 6 street canyon 6 Street canyon 4 Traffic pollution 4 Urban air pollution 4 Urban air quality 4 air monitoring 4 air pollution 4 article 4 concentration (parameters) 4 exhaust gas 4 nitrogen oxides 4 ozone 4 traffic 4 urban area 4 Air filters 2 Air quality 2 Atmospheric particles 2 Atmospheric pollution 2 Atmospheric turbulence 2 Atomic force microscopy 2 Bioindicator 2