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Podatke o kvaliteti zraka osigurao: the Atmo Auvergne (atmoauvergne.asso.fr)
Imajte na umu da su mjerenja za PM 2,5 (fine čestice) uzeta sa stanice: Gare, Clermont, Auvergne and the measurements for PM10 (respirable particulate matter), O3 (ozone) and NO2 (nitrogen dioxide) are taken from the station: Beaulieu, Clermont, Auvergne