Pack of cigarettes a day - about 500 X-ray irradiation for the year! Temperature of 700-900 degrees smoldering cigarette! Smoker's lungs with the experience - black, rotting mass. After inhaling nicotine enters the brain in 7 seconds. Nicotine causes spasm of vessels, from here malnutrition oxygen to tissues. Spasm of small vessels makes the skin aging. The hazards of smoking in the fact that there is bad breath, yellow teeth, inflamed throat, eyes turn red from the constant irritation of smoke.