What is liquid nitrogen and when is it deadly?
A liquid nitrogen leak at a Georgia poultry plant killed six people Thursday and left several others hospitalized, including a firefighter who responded, local officials said.
At least three of those injured at the Foundation Foods Group plant in Gainesville were reported in critical condition.
Poultry plants often rely on refrigeration systems that can include liquid nitrogen, which vaporizes into an odorless gas capable of displacing oxygen when leaked into the air.
Nitrogen is a naturally occurring ...