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From wearing COVID-19 masks? https://jamanetwork.com/journals/jama/fullarticle/2764955 https://jamanetwork.com/journals/jama/fullarticle/2764955 Quote: > Oxy

From wearing COVID-19 masks? https://jamanetwork.com/journals/jama/fullarticle/2764955 https://jamanetwork.com/journals/jama/fullarticle/2764955 Quote: > Oxygen concentration inhaled by healthy subjects wearing a surgical mask covering an N95 respirator decreases to about 17%, and the concentration of carbon dioxide increases to about 1.2% - 3% in a short period of light work (2-3). Although participants did not show any obvious changes in physical function and did not have any discomfort ratings, the average carbon dioxide concentration inhaled was far higher than the limit of 0.1% of indoor carbon dioxide concentration in many countries. With prolonged mask wearing, untoward reactions may gradually appear. In another long-term study, after wearing an N95 mask for 12 hours the CO2 concentration of subjects increased to 41.0 mmHg, far higher than the baseline value of 32.4mm Hg at the beginning of the test (4). The subjects mainly reported headache, dizziness, feeling tired and communication obstacles. In real life, the situations and time of wearing masks are much longer than the above experimental research settings.

Reason077 6y ago
That's for an N95 respirator combined with a surgical mask. Most of us are just wearing surgical-type masks, and I doubt they make any difference to oxygen levels. (If they did, I'd be very worried about surgeons!)
empath75 6y ago
You can take the mask off for a while if you're starting to get uncomfortable, but yes, it's probabaly not good to wear masks all day long, which is why the lockdown is important.
11235813213455 6y ago
on the other hand, lockdowns have reduced CO2 emissions in significant levels The solution is not rooms with air-filtration-conditioning or whatever, there are natural processes for that, the long term solution I see is just a reduced economic activity like during lockdowns, focused on essential sectors (so not luxury, entertainment, ..)
- AtlasBarfed 6y ago
  A drop in emission rates for a couple months doesn't mean that 100-200 ppm of CO2 magically drops out of the atmosphere. Locally it might help cities a bit. But the backlog of CO2 to be removed to reach reasonable post-industrial levels (to say nothing of preindustrial) is tens of trillions of dollars if done artificially. The solution is EVs + alt energy, and to stop industrializing every possible arable acre for agriculture and switch to vertical farming.
  - 11235813213455 6y ago
    permacultures are extremely productive, I believe it would work, combined with less consumerism from people, a big shift for sure

Reason077 6y ago

That's for an N95 respirator combined with a surgical mask. Most of us are just wearing surgical-type masks, and I doubt they make any difference to oxygen levels. (If they did, I'd be very worried about surgeons!)

empath75 6y ago

You can take the mask off for a while if you're starting to get uncomfortable, but yes, it's probabaly not good to wear masks all day long, which is why the lockdown is important.

11235813213455 6y ago

on the other hand, lockdowns have reduced CO2 emissions in significant levels The solution is not rooms with air-filtration-conditioning or whatever, there are natural processes for that, the long term solution I see is just a reduced economic activity like during lockdowns, focused on essential sectors (so not luxury, entertainment, ..)

AtlasBarfed 6y ago
A drop in emission rates for a couple months doesn't mean that 100-200 ppm of CO2 magically drops out of the atmosphere. Locally it might help cities a bit. But the backlog of CO2 to be removed to reach reasonable post-industrial levels (to say nothing of preindustrial) is tens of trillions of dollars if done artificially. The solution is EVs + alt energy, and to stop industrializing every possible arable acre for agriculture and switch to vertical farming.
- 11235813213455 6y ago
  permacultures are extremely productive, I believe it would work, combined with less consumerism from people, a big shift for sure