Fig. 1From: Chemistry, lung toxicity and mutagenicity of burn pit smoke-related particulate matterComparison of emission factors (EFs) of the burn pit smoke and published EFs from various biomass combustions. A EF for PM, B EF for CO, and C EF for CO2 vs. modified combustion efficiency (MCE). EFs from biomass combustions are obtained from published studies [44, 49]Back to article page