John Frederick of the University of Chicago hopes to discover more about the health effects of particulate matter, such as its relationship to incidents of asthma and a warming trend known as the heat island effect. Copyright 2003 The University of Chicago. f/researchaudio?a=y6J4wnCa”> f/researchaudio?a=RZrAnvPF”> f/researchaudio?a=ryhiusYv”>