[driftdiver]

How about CO2? It’s quick and effective. We also apparently have too much of it and it would help reduce it. Right? /s

[Ken H]

How about CO2? It is quick and effective.

Agonizing way to go. CO2 buildup is why drowning is so painful.

[Blood of Tyrants]

Or even carbon monoxide. Quick, painless, effective.

[sparklite2]

It’s a interesting subject. I read somewhere, maybe here, that an excess of CO2 in the lungs is what triggers heavier breathing to displace it. And since this is such an integral part of being alive, it’s wired in. However, an excess of nitrogen, which after all comprises most of the air we breathe, triggers no such response. So there is no feeling up being out of breath or needing to gasp. The lack of oxygen getting to the brain puts you away.

[Clay Moore]

Some years ago, I was filling CO2 cylinders and a safety popped off as it did periodically in the summer.

There was little ventilation that day and as I reached in to turn off the valve, I realized that I was getting woozy real fast so I backed out.

That said CO2 would not be my first choice but just use whatever is cheapest.

[blackdog]

I used to work in a meat plant with a kill floor operation. The animals would be on a conveyor line which moved very slowly while they were standing on it. It was routed thru a room which was about 97% CO2. In the time it took for the animal to exit the room, it was irrecoverably unconscious. It would then be hung by a rear leg with a chain hoist and it's throat would be slit and bleed out until dead. It was a very humane and efficient way of processing animals for slaughter. Better than the electric spike in the head, or the concussion round fired in the head.

They just went to sleep in the CO2 room.

[kjam22]

H2S..... it’s deadly with about two whiffs....

[The_Reader_David]

One wants a method that will not be ruled “cruel and unusual” by the local left-wing jusist. CO2 asphyxiation, unlike nitrogen asphyxiation, causes physical distress, since the body is cues to react to an overabundance of CO2 in the bloodstream by trying desperately to get more oxygen in the blood. Not so with lack of oxygen per se.