“…Therefore, the observed acceleration in mortality resulting from PM 1648 or PM 2.5 exposure was not due to renal failure. However, pulmonary toxicity and fibrosis have been reported with urban particles with the greatest toxicity seen with PM 2.5 (Churg and Brauer, 2000;Schwartz and Neas, 2000;van Zijverden et al, 2001;Buerke et al, 2002). Also, there has been a consistent link between increased incidence of mortality and morbidity due to cardiopulmonary complications and elevated levels of particulate matter in the air (Salvi et al, 1999;Kleinman et al, 2000;Huang, Hsu, and Chan, 2003;Pozzi et al, 2003).…”