You’ll never tear up from onion fumes again if you follow this simple trick for how to cut onions without crying.
While canning a large batch of vegetable soup, I discovered how to cut onions without crying. I placed a small fan adjacent to my cutting board, so the fan blew the onion fumes across the board and away from me.
I can now peel and cut onions all day long and not shed a tear. (Do stay away from the downwind side of the fan, though.)