Dual cigarette and e cig use increases human risk of lung cancer 40 times Stanton Glantz blog Smoking cigarettes has long been proven to cause severe lung damage, including chronic obstructive pulmonary disease (COPD), emphysema, and lung cancer. Over time, cigarette smoke destroys lung tissue, fills airways with tar, Eliminating Tobacco Use in Washington Kids American Heart Association Which Smoking Habit Puts You Most at Risk?