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Brown Spot of Tobacco NC State Extension Publications Your mouth is the gateway to your health. Don't let tobacco shut it down. Its not just about the yellow teeth, beyond the stains, smoking and chewing tobacco are leading causes of Smoking and Drugs Mouth Cancer Foundation A Tobacco Plant that Could Cure Cancer? JSTOR Daily 31 May World No Tobacco Day Tobacco affects more than lungs it leaves visible and invisible marks on oral and overall health. From tooth discoloration and delayed healing to Tobacco Plants and Drug Development

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