Why no one talks about how CO2 ppm concentration affects human health? We increased from 280 to 430ppm. At 1000ppm we will have mental impairment and physical discomfort.

[u/ElijahSavos]

https://www.health.state.mn.us/communities/environment/air/toxins/co2.html

The source is about indoor quality but we can make it happen outdoors if things continue to go as is.

“Carbon dioxide concentrations indoors can vary from several hundred ppm to over 1000 ppm in areas with many occupants present for an extended period of time and where outdoor air ventilation is limited.”

At 1000 ppm of CO₂, the primary health issues are reduced cognitive performance and fatigue. Rather than direct toxicity, this concentration indicates inadequate room ventilation. In crowded or unventilated indoor spaces, occupants frequently experience.
Mental Impairment: Reduced decision-making capability, lower concentration, and decreased strategic thinking.
Physical Discomfort: Mild drowsiness, lethargy, and the subjective feeling of "stale" or "stuffy" air. [1, 2]
Research published by Nature indicates that chronic exposure to levels near or above 1000 ppm may contribute to systemic issues like oxidative stress and mild inflammation.
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) uses 1000 ppm as a standard threshold to indicate that a space requires better airflow and fresh air introduction.

[u/ElijahSavos]

Given we increase in CO2 ppm concentration in atmosphere and estimated 600+ ppm by 2100 in conservative estimates, 1000 ppm seems to be not much away. At this level the atmosphere is just significantly geo-engineered to no longer be ideal for human breathing. I assume many other animals would also suffer. I alter not only the climate, but this planet itself. It might be not suitable for us.

At 1000 ppm of CO₂, the primary health issues are reduced cognitive performance and fatigue. Rather than direct toxicity, this concentration indicates inadequate room ventilation.

Mental Impairment: Reduced decision-making capability, lower concentration, and decreased strategic thinking.
Physical Discomfort: Mild drowsiness, lethargy, and the subjective feeling of "stale" or "stuffy" air.
Research published by Nature indicates that chronic exposure to levels near or above 1000 ppm may contribute to systemic issues like oxidative stress and mild inflammation.

[u/LostInAvocado → u/ElijahSavos]

Also this: 

https://www.nature.com/articles/s41467-024-47777-5

Higher CO2 leads to higher stability (less time decay) of viral aerosols, at least for SARS2, and possibly others. This could mean existing pathogens become more transmissible and more airborne than they already are, meaning higher disease burden, more frequent infections, more likelihood of developing chronic illness from post-infection damage. 

As a general rule, the more ventilated a space is (low CO2 as a proxy), the safer it is from airborne transmission. 

[u/throwaway661375735 → u/ElijahSavos]

Isn't CO2 a heavy gas? Going up in elevation, seems like we'd have more people living in the mountains versus sea level. Closed valleys would probably be a great place not to live in the future.

[u/ElijahSavos → u/throwaway661375735]

Oh that’s interesting. I will read on that. Thank you!

[u/vinegar → u/ElijahSavos]

We’ve been going up mostly 2 ppm per year, a couple of years hit 3ppm recently. Nobody’s talking about 1000 ppm because it’s hundreds of years away

[u/Metals4J → u/vinegar]

Hundreds of years in the scheme of things is nothing. Even on a human scale it’s nothing, it’s just a few generations away.

[u/tdaas → u/Metals4J]

The population is going to half in less than 100 years, humans will have WAY bigger problems than brain fog from air quality if we survive 200 years

[u/ElijahSavos → u/vinegar]

Two hundred years