Rising CO2 Tied to Subtle Shifts in Human Blood Chemistry
A NHANES-based study (1999–2020) finds rising atmospheric CO2 correlates with higher blood bicarbonate and opposite trends in calcium and phosphorus; although changes are small now, models suggest ongoing CO2 increases could push some blood chemistry values toward the limits of healthy ranges in the future, with bicarbonate potentially serving as a biomarker for CO2 exposure.