LUNG CANCER Lung cancer is the most common cause of cancer death among men and women. CAUSES Cigarette smoking Environmental tobacco smoke (ETS) or second-hand smoke Alcohol Tobacco chewing Occupational exposures to asbestos, arsenic, bischloromethyl ether, chromium, mustard gas, nickel and polycyclic aromatic hydrocarbons. Ionizing radiation Prolonged exposure to low-level radon Low fruit and vegetable