Fig. 3
From: Chemistry, lung toxicity and mutagenicity of burn pit smoke-related particulate matter
Comparison of particle-bound PAH concentrations in the burn pit smoke and various biomass smoke emissions. PAH concentrations in PM emitted from biomass combustions are obtained from published studies: wood smoke from woodstove [39], grass pellet smoke from woodstove [101], grass/wood smoke from biomass boiler [38], wood/pellet smoke from biomass boiler [47], hard/softwood smoke from fireplace [35], biomass smoke from fireplace/woodstove [30]