You are correct. Insofar as altitudes at which people live, the percentage is the same.
But quality of air is important too.
In some densely populated cities the oxygen percentage can be as low as 12%
Climate-gate
- Thread starter Photizo
- Start date
You are correct. Insofar as altitudes at which people live, the percentage is the same.
But quality of air is important too.
In some densely populated cities the oxygen percentage can be as low as 12%
Do you have a cite for that? I've never seen any actual numbers.
See here
http://www.theguardian.com/commentisfree/2008/aug/13/carbonemissions.climatechange
That's the best link I can find.
I can't find any links to reputable sources who have done measurements.
Perhaps it isn't true.
Last edited:
so any reduction in global O2 % levels would have an immediate flow on effect to all areas that are already compromised regarding O2 %.
Hence the urgent need in the mid 80's to improve air quality in closed spaces. Banning smoking and reducing CO oxygen blocking effects to start with. IMO The worlds top medics knew full well what was happening even back then in the 80's
Last edited:
Correct. It's all going to come down/"happen for us" right here on earth.
Yes, but I wish I could find some accurate figures.
Actual records of O2 levels in major cities should not be such a hard figure to find.
I've been looking for half an hour now, and all I can find is " reports say......"
Useless.
Actually I find the ever increasing incidence of Lung disease and cardio-vascular disease to be most telling IMO
Even with the significant reduction in people smoking, lung disease is still one of our top issues.
Oxygen deprivation is no joke...
How ever it is no surprise that accurate data would be unpublished when you think about it...
I mean to say (unreported), 23+ billion US tons of O2 a year just by the commercial aviation industry is staggering when you think on it... [23 billion tons O2 pa, may be a terrible underestimation by me too, I might add]
Last edited:
There isn't a single figure showing measured oxygen percentage in the air that I can find, anywhere.
If it does vary, I would have thought that it would be fairly basic to indicate air quality.
"Come to XXXX, we have the most oxygenated air in the Midlands."
If it does vary, I would have thought that it would be fairly basic to indicate air quality.
"Come to XXXX, we have the most oxygenated air in the Midlands."
So with all hysterics associated with climate change not one single O2 level report for major cities is available?
Totally missing?
Not even amateur (high school study etc)?
and the two key high altitude research stations mentioned in an earlier post appear to be no longer open to public (internet) scrutiny. ( after reporting a significant drop in global O2 % )
Conspiracy perhaps?
Conspiracy perhaps?
Yes, it's odd.
No-one seems to be measuring it.
I can't see that it is a conspiracy.
Anyone can make measurements.
yet mostly everyone thinks as do some members of this forum that O2 reserves are so large that O2 depletion is inconceivable.
What seems to be the issue is not so much depletion of a huge resource but changes in O2% of atmosphere.
Any rapid reduction to the % of atmosphere can be disastrous for human health and comfort.
You only have to sit in a crowded auditorium for a few hours and leave to notice the difference in physical stress associated with ambient O2 IMO
and count the increasing numbers of people who have to sleep with oxygen bottles to get through the night... (glib)
Last edited:
The story regards me is that in the mid 80's I suffered the first of 5 spontaneous neumo-thorax ( collapsed lungs - no disease apparent) with eventual resection of the left by half. So, I have been living in an oxygen deprived state since the mid 80's. Therefore I am ultra sensitive to oxygen levels and apparently always have been. So crowded auditoriums pose a significant challenge and the difference between being inside and outside one is very noticeable.
Sorry you have that impairment, but there is huge amount of O2 in the air - about 3 pounds of it over every square inch! Green plants are adding more (and probably at an accelerating rates as many are CO2 limited in how much they can make.)
Switching more to nuclear, wind or PV power generation would help keep the O2% in air about steady, if not slightly increasing to be even greater than now when CO2 is 1000ppm say in 100 years and very little fossil fuel is burned for power, assuming civilization can last that long.
Last edited by a moderator:
I guess that when the world finally decides to prohibit air travel except for essential services and military needs, the global population may finally take the threat of O2 reduction seriously and bring in the changes needed to save themselves. O2 deprivation effects us personally where as CO2 is generally considered as more indirect...
Last edited:
and we need every mico ounce of those 3 pounds per square inch (sea level I assume) and more if we can get it, to maintain our health... IMO
Very, very over stated, even for people who have lung problems who, say smoked too much and lowered the lung capacity more than yours has been. Remember the main air health problem in Denver is air pollution, not lack of O2.
say you have a significant hydrocarbon pollution % in a city, what has happened to the available oxygen%... ?
Can you have an increase in pollution with out a decrease in ambient oxygen%? I would think not...
It is so easy to down play the significance of O2%
Changes to the ratios are inevitable.
I learned that much using an automotive chassis dyno, gas emissions system in my early mechanic-ing days
Last edited:
If you work out how much oxygen we consume, then you will find that even in a badly ventilated and crowded room,
that the percentage of oxygen will not fall greatly in a few hours. Perhaps a percentage point or two.
It is the large increase in the percentage of CO2 that causes the impression that the air has become stale and unbreathable.
In such places, I feel unwell myself, but the problem is not the Oxygen level.
oh no doubt about it but I wonder why the O2 level is generally ignored... because when CO2% goes up O2% must come down.
After all can we inhale CO2? (rhetorical)