Other Causes of Lung Cancer The other 10 to 20% of lung cancers are caused by: Previous radiation treatment to the chest area Exposure to radon gas, an odorless gas produced naturally in some soils, can accumulate in homes or buildings and mix with the air you breathe Exposure to asbestos, a building material that is still inside many older homes and buildings Exposure to diesel exhaust, arsenic, chromium, or nickel Air pollution Family history of lung cancer While most lung cancer deaths occur in older people, researchers at Johns Hopkins report that lung cancer is increasing in younger people

Quitting Smoking by Age Forty Limits Negative Health Effects Quitting by 40 will stave off the lost decade a lifelong smoker should otherwise expect For all of you out there who might be trying to quit smoking, a massive new study headed by researchers with the American Cancer Society, the National Cancer Institute and others brings some encouraging news: If you quit by by 40, you can avoid the worst of what is in store
The Health Consequences of Smoking - 50 Years of Progress
The authors state that their findings should prompt extra efforts to prevent smoking experimentation and/or initiation earlier in the life course given that it appears to be critically related to more unbreakable lifelong smoking patterns. It is not clear why smokers with an earlier and more-intense smoking history tend to become daily smokers and have a harder time quitting, they said, but it may be due to early exposure to nicotine
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