Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct Smoking Lung Damage: The Effects of Smoking on Your Lungs Vaping is risky. Do not do it if you care about your lungs Thomas Eissenberg The Guardian Curious about the difference between healthy lungs and a vapers lungs? See how vaping impacts your lungs, and why its best to quit early. Vaping Lungs vs Healthy Lungs: What You Need to Know