An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time, ...

Carbon dioxide levels in Earth's atmosphere are at their highest point in human history, a study released in early December reports. In fact, according to the study, it has been about 14 million years ...

Humans evolved in an atmosphere containing roughly 200–300 parts per million (ppm) of carbon dioxide (CO₂). Today, that figure sits above 420 ppm, higher than at any point in the history of our ...

Study Suggests Human Blood Could Be Pushed Past Its Healthy Limits Within 50 Years In A Nutshell A new analysis of U.S. blood test data from 1999 to 2020 found that average bicarbonate levels in the ...