-Caveat Lector- <A HREF="http://www.ctrl.org/">
</A> -Cui Bono?-
Sun, 05 Mar 2000, Jim Lambert indicated:
>
><snip> ...if our bodies adapted to an environment with 150 %
> of today's atmospheric pressure, and 35% more oxygen, then
> we would be virtually invulnerable to bacteria, virus, mold,
> yeast,etc. We would be supermen for real!
> And, if this were true, then today's atmosphere would mean
> we have to take drastic steps not to fall prey to our body's
> natural vulnerabilities to these changes.
Jim,
Can you explain how the Earth's atmospheric pressure might have
once been 150% of its current level ? Is that possible ?
Actually most people can adapt well to lower oxygen levels in
one generation or less, as when a person moves from sea level
to live in a region at 10-12 thousand feet altitude, where the
air is relatively thin. Healthy people soon adapt with little
problem, by a natural increase in the number of red blood cells.
I've never heard that health of human populations decreases as
the air becomes rarified, with an increase in altitude. In fact,
health may actually increase in thinner air at higher altitudes
-- although this is partly due to CO (carbon monoxide) and other
pollutants settling down towards sea-level. And, with thinner
air, people breathe deeper, which provides a healthy increase in
lymphatic circulation.
The following point is from [EMAIL PROTECTED]:
>
> ......it's unlikely the earth's atmosphere was a 35% O2 while
> we were around. Oxygen is great stuff that is also extremely
> dangerous in it's effect of lowering the temperature at which
> substances will combust. Human flesh as it turns out,
> burns quite nicely at 28% O2 (in the presence of a flame).
> One lightening strike in a 35% O2 environment could do a
> LOT of damage.
But what if the atmospheric pressure was increased by 150% ?
Could this offset the combustibility problem of higher O2 levels,
or could this exacerbate the problem ?
I still have reservations about accepting the theory that free
O2 levels were 35% sometime in the last 50,000+ years -- merely
based upon measuring O2 in air pockets in Antarctic ice samples.
Assuming Jim's information is correct -- that natural ozone holes
cyclically reoccur over Antarctica -- then long term solar and
cosmic radiation (that enter more easily through these ozone holes)
may have dissociated some water vapor into H2 and O2, inside those
air pockets found in the ice. The smaller molecules of H2 could
have more easily diffused out of those air pockets, leaving behind
a relative excess of O2, thus distorting the recent scientific
measurements, and leading to false conclusions...
However, this may be a natural, long term buffering process, which
resupplies atmospheric free O2 when too much becomes 'bound up'
into CO2, NOx, SOx, or whatever gasses are involved in creating
those ozone holes. The vast majority of this posited 'radiation-
dissociated O2' would not be created hidden inside Antarctic ice
cap bubbles. It would be created in the open, and the dissociated
H2 would diffuse off into space, leaving behind the O2, to slowly
replenish the Earth's atmosphere.
Bill
.
<A HREF="http://www.ctrl.org/">www.ctrl.org</A>
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