[Rockhounds] muriatic acid for cleaning...

[J Bryan Kramer]

I wasn't thinking of asphyxiation, if I understand this correctly the CO2
concentration in the air is the controlling feedback mechanism for the human
respiration system. Elevated levels of CO2 interfere with the system, this
is not a short term effect of course so brief exposures to higher CO2 levels
are not a problem.

BK

I know of no cases of death or illness from breathing CO2 except when a
> freakish natural event released a huge volume of the gas in a lake which was
> in a valley and all the animals died. CO2 is much heavier than air and the
> gas cloud clings to low elevations. You'd likely breathe more CO2 by
> inhaling over a freshly poured glass of seltzer water than from cleaning
> minerals. Yes, those bubbles in soda are CO2.
>


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