Smoking in teens not only leads to addiction but also poses both immediate and long-term health risks. Learn about the many harmful effects of smoking from coughing and shortness of breath to cancers and coronary heart disease. Additionally, teen smokers are more likely to engage in other harmful behaviors, such as alcohol and illegal drug use, and are likely to continue smoking into adulthood, exacerbating health problems. The Danger of Smoking and Vaping part 2