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A comment on Indoor CO2 may reach levels harmful to cognition by the end of this century. Parent comment

Re:Indoor CO2 may reach levels harmful to cognition by the e... by OpticalWindows on Saturday September 19, 2020 @03:33PM (#24529870)
I do think we should think about passing out personal CO2 alarms now and in the future. The problem would be calibration like you said and cost for a new unit.
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