More studies in 2019 record that high levels of carbon dioxide (CO2) adversely affect human cognition. In 80 years the level of carbon dioxide can increase enough to cut human performance on complex cognitive tasks by 50%.
Predictions of a 50% cognitive abilities drop come from scientists from the University of Colorado Boulder and the University of Pennsylvania. The study is pending, but available for reading online at the Earth ArXiv repository
The results of the study explain the outcomes for the planet if carbon dioxide (CO2) emissions continue to increase.
Based on observations of the human behavior, especially those, who live in the most gas polluted environments, where CO2 levels are permanently high, scientists warn that in the next 50 years abilities to plan multi-stage strategies, respond to any change, have the power to make decisions and use new information to achieve goals will decrease.