You’re halfway through chopping an onion, and your eyes start burning. A minute later, you’re crying like you just watched the ending of a really good movie — except there’s no movie, just a vegetable. You blink, you tear up, you maybe curse a little. And then you wonder: why does this keep happening? https://entechonline.com/why-onions-make-you-cry/
Juveriya Khan (Tue,) studied this question.