Are those who wear Masks getting more stupid?

Climate alarmist scientists claim that if the amount of C02 we breathe in increases to 680ppm by the end of this century (It’s around 430ppm at the moment), then our cognitive ability will drop by 16%. Guess what? If you wear a face mask to save you from the ’Rona, you breathe in between 20,000-30,000 ppm of CO2. What does this do to your intelligence?

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