Smoking termination is the most significant or vital measure that can stop or preclude lung cancer. A lot of products are now available in the market such as nicotine gum, nicotine sprays, or nicotine inhalers. These products were established helpful for people who are trying to quit smoking. Plummenting exposure to passive smoking is also a obliging and preventive measure. With the use of home radon test kit one can determine and permit improvement of increased radon levels in the home. Processes that allow early discovery of cancers, such as the helical low-dose CT scan, may also be of worth in the classification of small cancers that can be cured by surgical resection and deterrence of widespread, deadly metastatic cancer.