- Continued CO2 emissions may directly harm human cognition by impairing decision-making and strategic thinking.
- Indoor CO2 levels could reach up to 1400 ppm by the end of the century, exceeding current outdoor levels and historical exposure.
- High CO2 in enclosed spaces reduces oxygen to the brain, leading to sleepiness, anxiety, and cognitive decline.
- Outdoor CO2 levels are predicted to rise to 930 ppm by 2100 in high-emission scenarios, with urban areas having higher concentrations.