“…Many studies have been conducted on indoor air pollutants including indoor radon ( 222 Rn) (Denman et al, 2007;Espinosa et al, 2008;Tuia and Kanevski, 2008;Vinson et al, 2008;Ciolini and Mazed, 2010;Yoon et al, 2010), particulate matter and CO 2 (Jones et al, 2000;Korhonen et al, 2000;Isbell et al, 2002;Lee et al, 2002a;Michielsena and Tymen, 2007;Shao et al, 2007;Perrier and Richon, 2010;Wang et al, 2010). Recently, the Chinese Government has recognized the potential risks and problems related to indoor air pollution, and it has established the new IAQ standard (GB/T18883-2002, China).…”