So that we can be healthy and learn how to take good care of our bodies
From what i heard, when carbon monoxide is in a person's blood (smoker or non smoker) it can kill you, it is a sign of poison in your blood. With smokers it is worse because they are smoking something that has a high content of carbon monoxide which can cause heart problems, lung cancer, birth defects, etc. So thats what i think
Cancer because of the constant use of them and the niccotine inside as well as the numerous types of poisons inside the ciggerette and the smoke.
I believe that it is a major life change.