"T o d d P a t t i s t" wrote in message
...
"Marc J. Zeitlin" wrote:

..... An excess of CO2 will not kill you.

Actually, Todd, that's not true.

You're right, I was wrong. I was thinking of nitrogen
excluding oxygen (been playing with lots of liquid nitrogen
recently and had N2 on my mind.
--
T o d d P a t t i s t
(Remove DONTSPAMME from address to email reply.)

I think nitrogen and carbon dioxide are both heavier than air ( that is,
they will pool in low areas) A sufficient excess of either can suffocate
you. You can wind up drowning without getting wet. As a matter of fact, I
saw a cable channel episode recently describing the loss of a few buffalo in
a small valley in Yellowstone Park from such an emission near one of the
active geyser areas. That incident probably involved a mix of volcanic gases
rather than just CO2 but no one knows for sure, since it was a transient
unmonitored event.

Harold Burton