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American Lung Association: General Smoking Facts
This page discusses facts and statistics on smoking, both in the United States and world-wide. Areas addressed include the thousands of chemicals in cigarettes, rates of lung disease in smokers, smoking-related health conditions, smoking...
National Cancer Institute at the National Institutes of Health
Smokeless Tobacco and Cancer: Questions and Answers
This website provides brief responses to several questions about smokeless tobacco and the risks associated with its use including: "What harmful chemicals are found in smokeless tobacco?," and "What about using smokeless tobacco to quit...