TobaccoĀ is the common name of several plants in theĀ genusĀ NicotianaĀ of theĀ familyĀ Solanaceae, and the general term for any product prepared from theĀ curedĀ leavesĀ of these plants.
More than 70 speciesĀ of tobacco are known, but the chief commercial crop isĀ N. tabacum.
The more potent variantĀ N. rusticaĀ is also used in some countries.
Dried tobacco leaves are mainly used forĀ smokingĀ inĀ cigarettesĀ andĀ cigars, as well asĀ pipesĀ andĀ shishas.
They can also be consumed asĀ snuff,Ā chewing tobacco,Ā dipping tobaccoĀ andĀ snus.
Tobacco contains the highly addictiveĀ stimulantĀ alkaloidĀ nicotineĀ as well asĀ harmala alkaloids.
Tobacco use is a cause or risk factor for many deadly diseases, especially those affecting theĀ heart,Ā liver, andĀ lungs, as well asĀ many cancers.
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