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 Did you know some flavored vapes contain diacetyl, a chemical linked to popcorn lunga rare, irreversible lung disease? It scars the small airways, making it hard to breathe. Symptoms can mimic Flavors that contain diacetyl according to OSHA (OSHA, 2010). Download Table Vaping, Diacetyl, and Popcorn Lung: Is the Threat Real? Vaping360