Fig. 1From: Exposure to ambient particulate matter alters the microbial composition and induces immune changes in rat lungParticle size distribution during exposures to biomass fuel (BMF) and motor vehicle exhaust (MVE). Concentrations of PM10, PM2.5, and PM1 differed significantly in the BMF exposure room; PM10 concentrations were highest. Concentrations did not differ in the MVE exposure room. PM, particulate matterBack to article page