Nine out of ten lung cancers occur in people who smoke cigarettes or cigars. About half of throat cancer and mouth cancer occur in smokers and almost all particularly aggressive mouth cancers occur in people who chew tobacco. Bladder cancer is also associated with tobacco use and other cancers have been implicated.
Tobacco remains the leading cause of preventable cancers.
A diet high in fiber and low in fat is associated with less colon cancers. An additional benefit of low fat diet appears to be a lower chance of breast cancer and prostate cancer. Both breast and prostate cancer occurs less frequently in people who participate in exercise programs over long periods of time. Exercise is also beneficial in reducing the risk of colorectal cancer. In Rhode Island there is a high death rate from melanoma, one of the most difficult cancers to cure once it has gotten established.