Currently, the issue of nanoparticles is a very dynamic and developing scientific research area. Their positives are indisputable, as proven by a number of scientific papers and studies. On the other hand only a very small part of the overall research on nanoparticles pays attention to their possible negative consequences, especially from the point of view health risks. In many sectors of human activity (industry, energy, etc.), nanoparticles are released into the environment. The same is true in transport, especially in case of combustion of fossil fuels with all their negative consequences on the human organism. This paper presents the results of nanoparticle concentration measurement in traffic-loaded urban area. It includes continuously evaluated data measurements from different periods and different times in relation to traffic intensity at the monitored area. The results of the nanoparticle content readings confirmed the increased concentration of nanoparticles in relation to traffic intensity.Keywords: urban area, traffic, monitoring, concentration, nanoparticles
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