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Tobacco used to make discount cigarettes is a tall, leafy annual plant, originally grown in South and Central America, but now cultivated throughout the world, including southern Ontario. There are many species of tobacco; Nicotiana tabacum (or common tobacco) is used to produce cigarettes. Nicotine, a powerful central nervous system stimulant found naturally in the tobacco leaf, is classified as a drug. Nicotine is one of the main ingredients in tobacco. In higher doses, nicotine is extremely poisonous. It is commonly used as an insecticide. Tobacco leaves can be burned and inhaled (in the form of cigarettes, cigars, pipes, smoke, etc.) or absorbed through the mouth (in the form of spit tobacco, chew, or snuff). The membranes in the nose, mouth, and lungs act as nicotine delivery systems - transmitting nicotine into the blood and to the brain.

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