I see that various news outlets are stumbling over themselves trying to describe Oklahoma’s new death-sentence method of execution.
Mostly, “nitrogen” is not being described as easily as it could be.
I guess story writers don’t want to mention that about 78% of the air you breathe is Nitrogen.
Anyway, it’s fairly simple to remove oxygen from some air from our atmosphere, and you’re left with mostly nitrogen and a bit of argon.
So yes, Oklahoma plans to suffocate its prisoners.