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    Why is it that when you run the faucet while cutting onions, your eyes don't bur

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Here are some friends with simlar question as we.And I have this question for many days,anyone help us?
Kitty said: Yes.Why is it that when you run the faucet while cutting onions, your eyes don't bur-I try seach this on internet but no results found.Maybe this is a stupid question.
Mike said: oh,no,you are wrong.I have found as below for this question(Why is it that when you run the faucet while cutting onions, your eyes don't bur),it will help you,my kids.



Answer:
Probably because when you run the faucet, water goes down the drain. As the water drains, it creates a vacuum effect, sucking air down the sink. The compounds in onions that make your eyes water will be sucked down the drain, instead of wafting up into your eyes, provided you're cutting them close enough to the sink, and the water flow is sufficient to create a strong enough vacuum effect.
Because the stuff that irritates your eyes does not go into the air.
the water washes away the fumes that irritate your eyes
Because the enzymes in the onions that make you tear are attracted to water.

You could keep your mouth open too and it would work but then you would look kinda silly.
That does not work at all for me. I have to slice them on a cutting board near an open flame; but not TOO close!


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