The Rising CO2 Concern: A Threat to Our Blood Chemistry?
A recent study has revealed a startling finding: the increasing levels of carbon dioxide (CO2) in our atmosphere are now detectable in the blood of humans. This discovery raises important questions about the potential impact on our health and the delicate balance of our bodies' chemistry.
Over two decades of health data from a US population database, scientists have identified shifts in blood chemistry that align with higher CO2 exposure. While these changes are not yet cause for alarm, the trend is concerning. According to the researchers' projections, if current trends persist, some blood chemistry values could reach the upper limit of today's accepted healthy range by 2076.
Alexander Larcombe, a respiratory physiologist at Curtin University in Australia, explains, "We're witnessing a gradual shift in blood chemistry that mirrors the rise in atmospheric CO2, which is driving climate change."
The study highlights a potential issue with bicarbonate levels. Bicarbonate, which is formed when CO2 is converted in the blood, plays a crucial role in maintaining healthy pH levels. However, Larcombe and his colleague, Phil Bierwirth, suggest that bicarbonate levels could serve as a blood tracer for atmospheric CO2 concentrations.
By analyzing blood chemistry data from the US National Health and Nutrition Examination Survey (NHANES), the researchers found a 7% increase in average blood bicarbonate levels over the study period, from 23.8 to 25.3 milliequivalents per liter. This increase corresponds to the rise in CO2 levels during the same timeframe.
Interestingly, calcium and phosphorus levels exhibited opposite trends, with calcium decreasing by 2% and phosphorus by 7%. This may be linked to the body's response to dissolved CO2 in the bloodstream, which disrupts the acid-base balance. The kidneys conserve bicarbonate to maintain pH, while bones buffer acid by exchanging minerals like calcium and phosphorus.
Despite the current small shifts, the parallel rise in CO2 levels is alarming. If the researchers' predictions are accurate, we may witness physiological changes at the population level over time. Bierwirth notes, "Our bodies may not be adapting to the rising CO2 levels, and we might be surpassing the range our bodies are adapted to."
The study's findings emphasize the importance of monitoring atmospheric CO2 levels and their potential impact on human health. As CO2 continues to rise, it may disrupt the delicate balance within our bodies, prompting further research and action to address this growing concern.
