I'm not sure which claim you're looking for a citation for, but if it was the CO2 and cognition claim, then I have a few for you. This study made quite a few r

I'm not sure which claim you're looking for a citation for, but if it was the CO2 and cognition claim, then I have a few for you. This study made quite a few ripples when it came out: https://ehp.niehs.nih.gov/doi/10.1289/ehp.1510037 https://ehp.niehs.nih.gov/doi/10.1289/ehp.1510037 > On average, cognitive scores were 61% higher on the Green building day and 101% higher on the two Green+ building days than on the Conventional building day (p < 0.0001). VOCs [volatile organic compounds] and CO2 were independently associated with cognitive scores. There was also this one, about decision making: https://ehp.niehs.nih.gov/doi/10.1289/ehp.1104789 https://ehp.niehs.nih.gov/doi/10.1289/ehp.1104789 > Relative to 600 ppm, at 1,000 ppm CO2, moderate and statistically significant decrements occurred in six of nine scales of decision-making performance. At 2,500 ppm, large and statistically significant reductions occurred in seven scales of decision-making performance (raw score ratios, 0.06–0.56), but performance on the focused activity scale increased. This one is a high-level overview of the literature on air pollution and health: https://ehp.niehs.nih.gov/doi/10.1289/EHP4869 https://ehp.niehs.nih.gov/doi/10.1289/EHP4869