2 ms·

They were exposed to C02 levels 10x higher than what you'd be exposed to even in a poorly ventilated conference room. It's likely that this mitigates any biolog

They were exposed to C02 levels 10x higher than what you'd be exposed to even in a poorly ventilated conference room. It's likely that this mitigates any biological differences. Nothing is certain, but that study combined with the fact that submariners have been operating for months at at time with C02 levels up to 5,000ppm and no one has ever noticed a problem says that studies showing a severe impact at 1,500ppm are probably wrong.

AtlasBarfed 6y ago
Well, what was the 02 concentration? Did they just change the CO2 and N2 relative concentrations while keeping the O2 normal? Not that I have detailed knowledge the implications of N2 vs CO2 on O2 uptake. I could be wrong, but I would think the CO2 increase comes at an O2 loss. While there is about 20% of O2 in the atmosphere, and <1% CO2, but it only takes .2% of O2 --> CO2 to drop the relative concentration of oxygen by 1 percent, which should be noticeable, especially the more out of shape you are. Naval seamen are also in a lot better shape, so they aren't on the borderline of O2 uptake (like a lot of the most vulnerable COVID-19 people). The general population is much more out of shape.
- learc83 6y ago
  The effects people are worried about are at 1k to 2k ppm. Even assuming CO2 is displacing O2 only, the drop in O2 levels is less than the change in about 100ft of elevation. Since oxygen only accounts for about 1/5 of the displaced gasses, you're talking about a difference in about 20 ft of elevation. Not enough to notice even for horribly out of shape people, and definitely not enough to cause the kind of effects reported.
- Tagbert 6y ago
  Have you been to Denver? Changing altitude has a greater than 1% change in O2 available. You feel it initially but quickly adapt and don’t tell them they are cognitively impaired. :)

2 ms·

They were exposed to C02 levels 10x higher than what you'd be exposed to even in a poorly ventilated conference room. It's likely that this mitigates any biolog

by learc83 6y ago

AtlasBarfed 6y ago
Well, what was the 02 concentration? Did they just change the CO2 and N2 relative concentrations while keeping the O2 normal? Not that I have detailed knowledge the implications of N2 vs CO2 on O2 uptake. I could be wrong, but I would think the CO2 increase comes at an O2 loss. While there is about 20% of O2 in the atmosphere, and <1% CO2, but it only takes .2% of O2 --> CO2 to drop the relative concentration of oxygen by 1 percent, which should be noticeable, especially the more out of shape you are. Naval seamen are also in a lot better shape, so they aren't on the borderline of O2 uptake (like a lot of the most vulnerable COVID-19 people). The general population is much more out of shape.
- learc83 6y ago
  The effects people are worried about are at 1k to 2k ppm. Even assuming CO2 is displacing O2 only, the drop in O2 levels is less than the change in about 100ft of elevation. Since oxygen only accounts for about 1/5 of the displaced gasses, you're talking about a difference in about 20 ft of elevation. Not enough to notice even for horribly out of shape people, and definitely not enough to cause the kind of effects reported.
- Tagbert 6y ago
  Have you been to Denver? Changing altitude has a greater than 1% change in O2 available. You feel it initially but quickly adapt and don’t tell them they are cognitively impaired. :)