[openasocket]

I don’t know much about chemistry, but is there a reason why they are using CO2 as the gas medium instead of something else? I was thinking ambient air would be readily available, and you don’t have to worry about suffocating people if it ruptures. Is CO2 particularly efficient to compress?

[GoToRO]

Air is no good because it has moisture in it. When you decompress it, it becomes ice, blocking and breaking pipes.