Cancer-causing agents and lung cancer etiology

A study of lung cancer etiology involves an investigation of cancer-causing agents. Cancer-causing agents that may be found indoors, especially in the workplace, include asbestos, radon , arsenic, chromium, nickel, tar and soot. These substances can cause lung cancer in never-smokers, and combine with cigarette smoke to further increase lung cancer risk in smokers. Many countries are working to control these cancer-causing agents in the workplace.