http://publications.europa.eu/resource/authority/language/ENG Raquel Trillo Zaragoza, Hourly air quality observation coverage (NO2) TRAFAIR-2020-044 This dataset provides the hourly evolution during the day of the observed concentration of NO2 pollutant in each point of the city Universidad de Zaragoza 23/06/2020 http://zaguan.unizar.es/record/94424 http://zaguan.unizar.es/record/94424