Smoking is very unhealthy. It is very well known that the smoke contains over 6000 chemicals which harm not only smoker but also those who are in vicinity of person who is smoking. Smoking effects every part of the body, it can cause cancers from mouth to lung, it can destroy your respiratory system and circulatory system. you must have seen those who are chronic smokers are always coughing and short of breath. Also smoke can cause hardening of arteries which can lead to High Blood pressure and ultimately heart failure. Due to very high blood pressure it is possible that the arteries which supply to cranium can get rupture leading to brain hemorrhage and death.