“…Recognized or probable carcinogens to which fire fighters can be exposed include asbestos, benzene, diesel engine exhaust, ethylene oxide, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, among others [International Agency for Research on Cancer (IARC), Aronson et ai. Jankovic et al, 1991;McDiarmid et al, 1991;Siemiatycki, 19911. Studies of fire fighters have reported excesses of brain cancer, malignant melanoma, leukemia, colon cancer, and other various cancers [Howe and Burch, 1990;Sama et al, 1990;Demers et al, 1992;Guidotti, 19931. Substances which may potentiate a cardiovascular reaction in fire fighters include carbon monoxide and dioxide, acrolein, benzene, cyanide, hydrogen chloride, particulates, sulphur oxides, and organic solvents [Kristensen, 1989a1.…”