Scientific research shows that repeated exposure to the contaminants of fires is the cause of cancer and other health problems for firefighters. The Service de sécurité incendie de Montréal (SIM), in collaboration with the Association des Pompiers de Montréal (APM), wants to do everything possible to educate firefighters about the risks of exposure to contaminants of fires and remind them to protect themselves properly against them. Properly wearing a complete firefighter's uniform remains the most effective way for firefighters to prevent occupational diseases. Operational procedures are also reviewed in order to ensure the best possible work practices.