[header] How to prevent lung cancer [title] Stop smoking tobacco products. [step] Cigarette and tobacco smoke contains harmful substances known as carcinogens that can damage the cells lining your lungs. Over time, smoking can lead to the development and multiplication of abnormal cells and increase your risk for lung cancer. 
[substeps] Contact your healthcare provider for help with smoking cessation programs if you experience difficulty with quitting smoking. Your physician may prescribe medications that can help you quit smoking, suggest that you join a smoking cessation support group, or recommend nicotine patches and gums that can help you kick your habit.