This book describes the work carried out by the author to characterise suspended particulate matter (SPM) in Cairo's atmosphere. The TSP (total suspended particulate) and the size fractionated PM10 (inhalable particulate matter) were collected at an urban area in Cairo. The particulate matter collected at each size category was then chemically analysed for major water-soluble species (sulfates, nitrates, chlorides, and ammonium) and heavy metals (lead, nickel, chromium, manganese, and zinc). The annual mean PM10/TSP percentage was found to be 27.28% which indicates that particulates in...