tobacco smoke contains carcinogens and chemicals: MedlinePlus Medical Encyclopedia Image Smokeless tobacco and cigarette smoking:

Smokeless tobacco and cigarette smoking: chemical mechanisms and cancer prevention Nature Reviews Cancer Carcinogens in Cigarette Smoke Metals, nonmetals and metalloids in cigarette smoke as hazardous compounds for human health ScienceDirect While many smokers do not develop lung cancer, smoking remains the leading cause of the disease, responsible for the vast majority of lung cancer deaths. Tobacco smoke contains dozens of carcinogens that

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