Domestic coal combustion is the most important source of outdoor and indoor air pollution in China. In order to investigate the characteristics of polycyclic aromatic hydrocarbons (PAHs) emitted from combustion of domestic coals with various maturities, a sampling system was employed in the present study to collect the emissions from five coals (one anthracite and four bituminous coals), and 24 PAHs were quantified in the emissions and were compared with those extracted from raw coals. The results show that...