On Fri, 17 Aug 2007 23:02:04 +0000, Shaun Van Poecke wrote:

Ive never actually breathed Co2 myself, though i have done my share of
confined spaces welding. Im very concerned about following the right
procedures for this type of work.


I'd think if it was that concentrated, your mucus membranes would let you
know RIGHT NOW, from the tingling, burning sensation as it dissolves
in the moisture and turns to carbonic acid. I've accidentally sniffed
"concentrated" CO2, and it was pretty obvious, and not pleasant at all.

Thanks,
Rich