Chapter I
Introduction
Adolescence is a stage of significant growth and potential but it is also considered to be a time of great risk. A lot of adolescents are facing pressures to use alcohol, cigarettes, or drugs and to start sexual relationships, thereby, putting themselves at high risk for intentional injuries and infection from sexual transmitted Diseases.
According to the World Health Report a considerable number of deaths would be prevented and tobacco related deaths would be halved if most of the adult smokers quit smoking over the next 20 years. People who begin smoking early have a greater risk of lung cancer compared to those who begin smoking at a later age as a result of the cumulative exposure
Smoking is the inhalation of the smoke of burning tobacco that is used mostly in three forms: cigarettes, pipes & cigars. A smoking habit is a physical addiction to tobacco products.
Many health experts regarded habitual smoking as a psychological addiction, one with serious health consequence. Nicotine, the active ingredient in tobacco, is inhaled to the lungs, where most of it stays. The rest passes into bloodstream, reaching the brain in about 10 seconds and dispersing throughout the body in about 20 seconds.
This study is about the effects of smoking in teenagers. The harmful effects of teenage smoking are both short-term and long-term. During adolescence , smoking interferes with ongoing lung growth and development, preventing the attainment of full lung function. Teenagers who smoke are less fit than their nonsmoking peers and more apt to experience shortness of breath, dizziness , coughing, and excess phlegm in their lungs. They are also more vulnerable to colds, flu, pneumonia , and other respiratory problems. Smoking for even a short time can produce a chronic smoker's cough . In addition to respiratory problems and a diminished level of overall well-being in adolescence, teenage smoking is also