This document is a student project on tobacco. It describes tobacco and its composition. It then discusses the current trends of decreasing tobacco consumption. The main body explains the damage tobacco causes to health, including increasing the risks of cancer, cardiovascular disease, and COPD. It also addresses the effects of secondhand smoke. The conclusions summarize that tobacco is harmful to both smokers and non-smokers, and brings respiratory and cardiovascular problems. Suggestions include using electronic cigarettes, not smoking in public, and quitting smoking.