Cigarette Smoking:
Smoking cigarettes is the major risk factor for lung cancer. It is responsible for more than 90% of all lung cancer cases.Smoke produced by Tobacco consists of more than 60 different highlytoxic substances, which play big role in the development of cancer.
If you smoke more than 25 cigarettes in one day, you are 25 times more likely to get lung cancer than a non-smoker. Smoking cigarettes also increase your risk of developing other types of cancers, such as mouth cancer.
Pipe and Cigar:
Pipe and cigar smoking also can lead to lung cancer.Tobacco smoke contains over 4,000 chemical compounds, many of which have been shown to be cancer-causing. In former smokers, the risk of developing lung cancer reaches that of a nonsmoker about 15 years after cessation of smoking.
Passive Smoking:
If you don't smoke yourself, exposure to other people’s tobacco smoke (known as passive smoking) can increase your risk of developing lung cancer.
Research has found that non-smoking women who share their house with a smoking partner are 25% more likely to develop lung cancer than non-smoking women who live with a non-smoking partner.
Exposure to Asbestos Fiber:
Asbestos fibers are silicate fibers that reside a lifetime in lung tissue after exposure to asbestos. The workplace used to be a common source of asbestos fibers exposure because asbestos was widely used in thermal and acoustic insulation. Today, Asbestos use is limited or banned in many countries, including the U.S, U.K and Canada.
Asbestos workers who do not smoke have a greater risk of developing lung cancer than nonsmokers, but asbestos workers who smoke have a risk that is 50-90% greater than nonsmokers
Inhaling Radon gas:
Radon is a natural radioactive gas that comes from tiny amounts of uranium present in all rocks and soils.Radon gas is a known cause of lung cancer, with an estimated 12% of lung-cancer deaths related to radon gas.If radon is breathed in, it can damage your lungs, particularly if you're a smoker.
Lung Diseases:
The presence of certain diseases of the lung, notably chronic obstructive pulmonary disease (COPD), is associated with an increased risk for the development of lung cancer. Pulmonary fibrosis (scarring of the lung) appears to increase the risk and this risk does not appear to be related to smoking.
Through DNA:
Individual genetic structure, may play a role in the development of lung cancer. Many studies have shown that lung cancer may occur in both smoking and nonsmoking relatives of those who have had lung cancer. People who inherit certain genes, like genes that interfere with DNA repair, may be at greater risk for several types of cancer.
Air Pollution:
Air pollution from vehicles, industry, and power plants can raise the development of lung cancer. 1-2% of lung cancer deaths are related to inhaling in polluted air. Experts believe that prolonged exposure to highly polluted air can carry a risk for the development of lung cancer similar to passive smoking.
Diesel Exhaust:
Exhaust from diesel engines is made up of gases and particulate matters. Many occupations, such as Toll booth workers, forklift operators, railroad and dock workers, miners and mechanics are frequently exposed to diesel exhaust. Studies have shown a small but significant increase in the risk of developing lung cancer.
Coal Fumes:
Exposing to coal fumes can also cause lung cancer. Coal mine workers, road construction workers, furnace workers and BBQ chefs are directly exposed to coal fumes and coal products. These coal products affect Lungs severely and lead to the development of lung cancer.
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