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wow, now that is scarey! I love the smell of that buttery flavoringon those packets of popcorn. Im always inhaling it when I first open it up. hehehehe
Just because something's safe to eat doesn't mean it's safe to breathe, and vice versa . It's much less dangerous to swallow mercury than to inhale the vapor; and Paraquat, which destroys your lungs if you ingest it, doesn't do so if you inhale it.
I am just stating that if only a few of the hundreds of workers have seen the problem it is probably a horrible sensetivity on their part. The factory still needs to improve ventilation and filtration. And there is no excuse for this not to be in place now.
How long does it take to put in a few fans and ducts. Heck even a BPPM meter. Butter Parts Per Million.