“…Important sources of these aromatic hydrocarbons are, therefore, combustion of fossil and modern (biomass, e.g., wood) fuels for the generation of energy, but also wild res and open organic waste combustion in agricultural elds. In many urban areas, exhausts from motorized vehicles with combustion engines are the most important emission source contributors, while domestic heating by wood combustion is a dominating emission source in many rural communities, essentially during the winter period and especially in forested areas, such as mountain valleys (Jaén et al 2021;Puxbaum et al, 2007;van Drooge et al, 2015). Occasionally, wild res are important emission sources for PAHs (Navarro et al, 2017), and wild re smoke can dominate even urban air quality (van Drooge et al, 2016).…”