what is the chief risk factor for lung cancer?
Research has found several risk factors that may increase your chances of getting lung cancer. Smoking. Cigarette smoking is the number one risk factor for lung cancer. In the United States, cigarette smoking is linked to about 80% to 90% of lung cancers. Using other tobacco products such as cigars or pipes also increases the risk for lung cancer. Tobacco smoke is a toxic mix of more than 7,000 chemicals.