 The study investigates the association between exposure to particulate matter, PM 2.5, and emergency hospital admissions for various causes in 26 U.S. communities. The results show that an increase of 10 gm3 in PM 2.5 concentration is associated with a significant increase in hospital admissions for cardiac causes, myocardial infarction, congestive heart failure, respiratory disease, and diabetes. The study also found that the association between PM 2.5 and hospital admissions was significantly modified by the chemical composition of PM 2.5, particularly by the mass of certain species such as Ni, Az, Cr, Br, Oc, and So42-. An interquartile range increase in the relative proportion of these species was associated with a 1-2% additional increase in daily admissions per 10 gm3 increase in mass. The study suggests that particles from industrial combustion sources and traffic may have greater toxicity on average. This article was authored by Kutraki's Petros, Franklin Mairdiff, Zanabeti Antonella, and others. We are article.tv, links in the description below.