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Smoking is just one thing that can cause destruction of the cells in the lungs at some people can get the disease Emphysema and you'll drown in your own mucus. People who work in mining, gases from wars, air pollution, etc., has been links to lung cancer and in some cases it's genetic. If caught early lung cancer can be cured.

Lung cancer is the uncontrolled growth of abnormal cells in one or both lungs. When a cell divides once, there should be twin cells with the same DNA. Unfortunately, sometimes the DNA in one cell mutates and continues to grow, at a much faster rate than normal cells. It can be caused by environmental factors (smoking, asbestos, etc.) or can be caused simply from the normal aging process.

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10y ago

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