Smoking,
Smoking is something many people do, mostly because of peer pressure. It can give you many diseases, like heart stroke, cancer, and many others. Because of the addicting nicotine, many can't stop it, and it turns their lungs black forever. It also burns the hairs in your throat. In other words, in affects your health in many ways forever. Usually students do it because of friends saying to try and getting stuck with the nicotine affects. If someone asks you to try, simply deny it for your health's sake.
Hope this helps ;)
