cigarettes are bad but marijuana is even worse. Cigarettes can cause a wide variety of diseases such as COPD, emphysema high blood pressure and it just slowly destroys you from the inside. When you are smoking marijuana most people add tobacco with it as well and this combines the problems associated with cigarettes to make it 10x worse as the marijuana affects the brain severely and causes long term memory loss. My friends smoke regularly and recently I have seen a big change in them now they like to sit at home most of the time and they have given up on studies and university almost completely. in my opinion cigarettes should also be banned.