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, THC Vape Pens: How They Work, Effects, and Safety Tips The more you know, the safer the choices you can make. E cigarettes and vape pens are not harmless. Many contain nicotine and other chemicals that can impact brain development, lung health, How do vapes work and what chemicals are inside them? BTN High Harsh Vape Carts: Why Cheaper Vapes Irritate Your Throat The Dispensary What Does Vaping Do to Your Lungs? Johns Hopkins Medicine