tobacco wikipedia Cultivation of Tobacco - Wikipedia
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As well as causing lung cancer and other chronic respiratory diseases, smoking is also a major contributor to cardiovascular diseases, the worlds number one killer

Use of smoking-cessation treatments in the United States

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National Institutes of Health Osteoporosis and Related Bone Diseases National Resource Center
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Avoid blowing vapour directly upwards Vapour naturally rises, so exhaling straight toward the ceiling increases the chance it will pass near a smoke sensor