A cigarette is a cylindrical rolled paper containing dried and shredded tobacco leaves. Its main component is nicotine , a stimulant that is highly addictive. A cigarette also contains approximately 600 other ingredients. The smoke coming from it contains approximately 7,000 chemicals, 69 of which are carcinogenic or cancer causing substance. Why people smoke? Peer pressure . People who have friends who smoke may feel pressured into doing the same to be accepted. Parental influence . Those who have parents or guardian who smoke are more likely to start smoking. Advertising and media . Advertisements of cigarettes portray smoking as exciting, glamorous. Stress relief . Some people smoke to manage tension and relieve stress from family or from work. Chemicals that are found in cigarettes Negative Health Impacts of Smoking Cigarettes smoking affects every part of the body, both inside and out. The harmful chemicals found in cigarette and in cigarette smoke damage th