Smoking is one of the worst things teenagers can do to their bodies. Yet every day,almost 5000 teenagers under age of 18 try smoking for the first time. No wonder, tobacco companies spend billions of dollar ever year on advertisements and other ways to make sure that these young people start smoking and buying their product. The companies count on them to become hooked for it keeps in them in business. The nicotine in cigarettes is a poisonous drug. It even be used to kill insects. Nicotine and dozens of other poisonous chemicals in tobacco can cause illness like heart problems and certain kinds of cancer. Some of these illness take years to develop but others can show up right away. Generally, smoking makes a teenager's body less fit and more susceptible to infections. For example, teenagers who smoke are much more likely to get a cold on pneumonia. Each time they like up, it hurts their heart, lungs and brain. And the longer the smoke, the worse the damage becomes. Smoking has such a long list of bads points that wonders why teenagers smoke. Along with bad breath and stinky hair and clothes, smoking makes it harder to run and to play sports. It also cause a difficulty for blood to move around in the body. Smokers often feel tired and cranky and cannot think quickly, not surprisingly, there are more likely to get in trouble in school and get lower grades. There are also more likely to lie to their friends or their parents about their activities; what they do and how they spend their money.Smoking therefore not only brings about health problems but may also develop undesirable traits. Teen smokers can become lazy, irresponsible and dishonest.