Popcorn lung: What is it, and who is at risk? Harvard Health What is Popcorn Lung? Popcorn Lung is a serious, permanent lung disease caused by inhaling harmful chemicals like diacetyl, sometimes found in flavored vapes. Tips for Parents & Caregivers: Talk Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times What Causes Does Vaping Cause Popcorn Lung? Africa Harm Reduction Alliance Microwave Popcorn Lungs Australia