is tobacco leaf carcinogenic Smoking hazardous to our health. Tobacco has at least 70 known cancer-causing chemicals that can cause heart diseases, lung diseases, & other serious health problems. Also, it is known that Smokeless tobacco and cigarette smoking:

Smokeless tobacco and cigarette smoking: chemical mechanisms and cancer prevention Nature Reviews Cancer Oral cancer and tobacco: developments in harm reduction British Dental Journal Did cancer exist before man made chemicals were around to create it? Science Questions with Surprising Answers Tobacco carcinogens, their biomarkers and tobacco induced cancer Nature Reviews Cancer NC State University Tobacco Connection: Vol. 1, Num. 1 Tobacco Growers Information NC State Extension

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