Smoking can cause such lung disorders as emphysema and chronic bronchitis. people who smoke over a pack a day have almost triple the risk of contracting pneumonia than that of nonsmokers. By lowering levels of estrogen in men and women , smoking speeds bone loss. If a woman smokes a pack of cigarettes every day, she’ll enter menopause with 5 to 10% less bone mass than a nonsmoker. In men, in the same way smoking clogs cardiac vessels. The good news is that no matter what your age or how long you’ve smoked, you’ll live longer if you quit today.