mostly smoking though
2nd hand smoke
causes lung cancer
smoking
smoking
Lung cancer and mouth cancer, definitely.
Smoking causes stroke, lung cancer, throat cancer, tumors, oral cancer, emphysema, blindness, heart attack, and other diseases.
The cancer society's view on smoking is that smoking causes at least 80% of lung cancer deaths
smoking is the most important risk factor responsible for the disease. Other environmental factors that may predispose a person to lung cancer include such industrial substances as arsenic, nickel, chromium
Lung cancer occurs when something stimulates cells in the lung or lungs to begin to multiply uncontrollably. The most common cause of lung cancer is smoking, although there are other causes, usually involving inhalation of foreign particles.What causes lung cancer? The biggest cause of lung cancer is smoking, approximately 36,000 people in the U.K. die from lung cancer every year, 90% of those lung cancer deaths are from smoking. If you are a non-smoker there is a risk that you can get lung cancer from passive smoking, though the risk is not as high than if you smoke yourself. Passive smoking could be responsible for several hundred, lung cancer cases every year. Another possible cause of lung cancer is exposure to certain chemicals and substances such as asbestos, radon gas and nickel, but this is very rare. Air pollution has also been suspected as a cause of lung cancer, but this has not been proved.
Smoking causes lung cancer.
Some causes of lung cancer are smoking, or inhaling harmful chemicals such as radon or asbestos.
Smoking causes several cancers. (eg.: lung cancer, oral cavity, pancreas)