What is the Link Between Popcorn Lung and Vaping? The Dunken Law Firm Vapes don't produce harmless water vapor. They can contain addictive nicotine, cancer causing chemicals like acetaldehyde and formaldehyde, as well as heavy metals that don't belong in your body. Live Vape Free is Replying to @d4rkn3ss2l1ght Only half your vapes might have a lung scarring chemical is a wild thing to say in defense of vaping. But go off, I guess. Anyways, for those of you who care about worried about the Popcorn Lung diacetyl rumour (please read) Vaping Forum Planet of the Vapes