One of the most common problems today that are killing people, all over the world, is smoking. Many people start this horrible habit because of stress, personal issues and high blood pressure. Some people began showing off or some people wanted to enjoy it . One cigarette can result in smoking others, which can lead to major addiction. When someone smokes a cigarette they are not only hurting themselves, but others around them. Smoking does many horrible things to the human body that most people are not aware of.