So it would be healthy to breathe in Co2? It's fine to breathe in copius amounts of carbon dioxide? I always imagined it was a poison to the human body. I really wasn't getting confused with carbon monoxide. That shit's the silent killer, the reason we have to have our gas fires annually serviced.
So if you are in a room that contains far more Co2 than oxygen it doesn't matter? Sounds mad to me, but you're probably right as I haven't checked it out yet. I have just always assumed. Often the things you think you know you don't know at all...