On the dangers of smoking says a lot. However, the concern of scientists and doctors due to the spread of this addiction is growing , as long as there is still a significant number of people did not believe smoking is harmful to health. Smoking - not a harmless activity , which can be cast without effort. It's a real addiction , and even more dangerous , that many do not take seriously . Nicotine - one of the most dangerous poisons of plant origin. Birds ( sparrows , pigeons ) are killed when their beaks just bring a glass rod moistened with nicotine. Rabbit dies 1/ 4 drops nicotine dog - 1/ 2 drops . For human lethal dose of nicotine is 50 to 100 mg, or 2-3 drops . It is a daily dose enters the blood after smoking 20-25 cigarettes ( one cigarette contains about 6-8 mg of nicotine , of which 3-4 mg enters the bloodstream ) . Smoker does not die by the fact that the dose be introduced gradually , not all at once . Besides , part neutralize nicotine formaldehyde - other poison contained in tobacco. For 30 years, a smoker smokes about 20,000 cigarettes , or 160 kg of tobacco , consuming an average of 800 g of nicotine. Systematic absorption of small , non-lethal dose of nicotine is addictive , addiction to smoking . Nicotine involves the metabolic processes occurring in the human body , and become necessary. However, if a non-smoker people in one go will get a large dose of nicotine can lead to death . Such cases have been observed in different countries. Our great scholar - pharmacologist N.P.Krafkovym described the death of a young man after he was the first-ever smoked a big cigar . If you get more information, visit our site: BEST ESSAY CHEAP
