“… breathe easy. Atmospheric CO2 is not causing, nor will it ever cause, and direct threat to your health or cognitive performance.” Almost all trace elements and compounds, even beneficial ones, can be poisonous if ingested or inhaled in large enough concentrations. So, what about carbon dioxide (CO2)? Do we have to worry about any … Continue reading Current and Rising Atmospheric CO2 Concentrations Pose No Threat to Human Health