Tobacco was brought to Europe after Columbus discovery of America and then it spread around the world through trade. Today, according to the world Health Organization, one third of the world adult population smoke tobacco.Tobacco smoke contains such a substance as nicotine it is a stimulant, which increases dopamine levels in the brain and causes euphoria in smokers. Nicotine temporarily relieves the feeling of anxiety that occurs when Smoking cessation for a short period of time. However, he does not reduce irritability in Smoking.the Main part of nicotine neutralizes body, but even the remaining parts is enough to induce somatic and psychological effects, and to dependence. In the...
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