That lung scan visual hits hard, but the real takeaway is simple: vaping is not harmless water vapor. Chemicals found in some e cigarettes, including diacetyl, have been tied to serious lung damage, Health Effects of Vaping Smoking and Tobacco Use CDC E cigarette : le diactyle, une substance dangereuse ? Techniques de l'Ingnieur Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association