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, COPD: The Differences Between Emphysema and Bronchitis Affordable Portable Oxygen Concentrators 1st Class Medical Emphysema vs. Chronic Bronchitis: What's the Difference? The Impact of E Cigarettes and Asthma: What You Need to Know Emphysema vs. Chronic Bronchitis: Key Differences (2026)