
Keywords: آلودگی هوا; Air pollution; Human health; Radioactive contamination; Ventilation; Radon; Granite storage; Ac; concentration of radon, Bq·mâ3; M; molecular mass of 222Rn, 222.01752 g/mol; m; mass of 222Rn present in 1 m3 of contaminated air, pg; N; number of 222Rn