How can alcohol, tobacco, and other drugs cause harm?

Ruin your family life, and physical life. you will not have good friends, loose money, and everytime you drink/do drugs there is a chance that your next is your last (you dying) its very unsafe and can make you mean and irritatable when you are having a withdrawal (not good) you become desprate and might even steal to get money for more

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.