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The main ingredient in cigarettes is tobacco. Tobacco is a green, leafy plant that is grown in warm climates. Farmers use many chemicals to grow tobacco. They use fertilizers to make the soil rich and insecticides to kill the insects that eat the tobacco plant.
The most important component of cigarettes is tobacco, which graos in two varieties: Nicotiana tabacum, or cultivated tobacco, and Nicotiana rusica, or wild tobacco. Although transplanfing machines are available, the vast malority of the world's tobacco plants are still planted by hand.