You do not expel any gas when inhaling. Inhaling is the act of taking air in, if you mean when exhaling (breathing out) then carbon dioxide (aka CO2)
yes, we inhale about 1 litre of anal gas per day. EW
The gas we take in when we inhale is oxygen.
inhale oxygen
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plants
plants
when you inhale you breath oxygen when you exhale carbon dioxide
It can kill you if you inhale enough of it.
I can only tell you about helium. If you inhale it, you will sound funny for a minute or so.
Fire, explosions, burns. And don't inhale the gas.
carbondioxide and oxygen
Niterogen