The Truth . . . about Popcorn Lung

I just found out that someone I know has popcorn lung, an irreversible lung disease caused by inhaling the buttery aroma of microwave popcorn, or specifically diacetyl, the chemical used to produce the buttery taste in the absence of actual butter. Diacetyl is also found in candies and wines. [In interests of fairness, I would like to point out that this is not April First.:]Why have you never