For lung cancer, I'm not sure. 50% of smokers will die prematurely through a smoking related disease, however.
2006-10-01 21:34:54
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answer #1
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answered by Dirty_Idea 3
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Smoking, particularly of cigarettes, is by far the main contributor to lung cancer, which at least in theory makes it one of the easiest diseases to prevent. In the United States, smoking is estimated to account for 87% of lung cancer cases (90% in men and 79% in women), and in the UK for 90%. Cigarette smoke contains 19 known carcinogens including radioisotopes from the radon decay sequence, nitrosamine, and benzopyrene. Additionally, nicotine appears to depress the immune response to malignant growths in exposed tissue. The length of time a person continues to smoke as well as the amount smoked increases the person's chances of contracting lung cancer. If a person stops smoking, these chances steadily decrease as damage to the lungs is repaired and contaminant particles are gradually vacated. More recent work has shown that, across the developed world, almost 90% of lung cancer deaths are caused by smoking.
The Environmental Protection Agency (EPA) in 1993 claimed that about 3,000 lung cancer-related deaths a year were caused by passive smoking. However, since this report was based on a study that was alleged to be heavily biased and was ruled by a federal judge to be "unscientific", the EPA report was declared null and void by a federal judge in 1998.
Percentage of lung cancer deaths attributable to smoking in the developed world for all ages
Men - 92.5
Women - 68.8
Both - 86.6
Recent investigation of sidestream smoke suggests it is more dangerous than direct smoke inhalation.
2006-10-01 23:14:16
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answer #2
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answered by Anonymous
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Tobacco use is the single largest preventable cause of cancer in the world. 40% of cancer could be prevented, mainly by not using tobacco, having a healthy diet, being physically active and preventing infections that may cause cancer.
2006-10-01 22:29:53
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answer #3
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answered by gangadharan nair 7
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how about this one Give uP smoking an die Healthy
2006-10-01 21:30:36
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answer #4
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answered by GOOCH 4
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