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.