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Continued fossil fuel emissions and cognition impairment

It has been claimed that the dangerous rise in atmospheric CO2 levels will impede our brain functions, and namely that the continued fossil fuel emissions will impair cognition. In particular, it is said that indoor CO2 levels may reach levels well above 1,000 p.p.m. and this may be harmful to cognition by the end of this century. It is shown as even continuing at the present rate the atmospheric CO2 concentration is not expected to exceed 690 p.p.m. by 2100. Since no significant effects on cognitive performance are seen also for indoor CO2 levels much higher than 1,000 p.p.m., opening the window of crowded spaces could be a simple but effective mitigation strategy better than building up wind and solar capacity.