urban atmosphere 26 Argentina 20 atmospheric pollution 18 air quality 16 urban area 14 Air pollution 12 carbon monoxide 12 Buenos Aires 10 Carbon monoxide 10 South America 10 Air quality 8 Buenos Aires [Argentina] 8 Urban air pollution 8 Urban air quality 8 air pollution 8 dispersion 8 model 8 priority journal 8 street canyon 8 traffic emission 8 Nitrogen oxides 6 article 6 atmosphere 6 atmospheric dispersion 6 atmospheric modeling 6 concentration (composition) 6 concentration (parameters) 6 conference paper 6 nitrogen dioxide 6 Air pollution control 4