Although cigarettes are addictive, nicotine can stimulate the human body. Entering the human body will stimulate the visual nerve under the brain to produce an exciting feeling. Long term smoking is used to this state. Once you stop inhaling nicotine, you will feel depressed, weak, weak and yawn.
Tobacco is the largest preventable cause of death in the world today, and half of tobacco users will die from tobacco use. At present, the total number of smokers in the world exceeds one billion, accounting for about one quarter of the world population. Tobacco use causes more than 5 million deaths worldwide every year. In developing countries, with the steady growth of population and the vigorous marketing measures of tobacco enterprises, the number of tobacco users continues to grow.