In Chapter 9. It is not easy to quit smoking cigarettes. Nicotine is a physically addictive substance. After an initial rejection by the body, a tolerance level develops in the smoker, and withdrawal symptoms occur when nicotine is withheld.
Cigarettes also produce a psychological dependence.
Smoking Facts Cigarette smoking is our nation's number 1 preventable cause of illness and premature death. Over 420,000 people in the U.S. die from the effects of smoking each year. Nonsmokers who inhale secondhand smoke from a burning cigarette have an increased risk of lung cancer and heart disease as well. Children of smokers have twice the incidence of respiratory ailments as the children of nonsmokers. Well, that works for some, but not all, smokers.