[NorthMountain]

Then tell me why we can't use a rope or firing squad any more? Let the inmate choose: rope or bullet.

Pure, dry nitrogen gas is both cheap, non-toxic, and lethal. Put the condemned person in a sealed chamber, pump it full of N2 for about 15 minutes, then purge with natural air and remove the corpse.

[wbarmy]

non-toxic, and lethal.

I find that statement to be a bit incongruous. Non-toxic and lethal.