ok so I stumbled cross this becuse in n episode of ST:TNG (S3E01 "Evolution") there is mlfunction tht releses "nitrogen oxide" on the bridge nd everyone is coughing.
so I looked up different gses tht hve N nd O, none hve tht exct nme. noticed tht nitric oxide is pprently only produced when you brethe in through your nose:
Nasal breathing produces nitric oxide within the body, while oral breathing does not.
nywy the reference led to this rticle
yeah but my nose has been broken like six times so you're going to have to put up with it sweaty