Rising CO2 may already be showing up in human blood — a "potentially toxic atmosphere in 50 years"
For most of human evolution, the air held about 300 parts per million of carbon dioxide. It has now surpassed 420 and is climbing by more than 2 ppm per year. A new open-access study in Air Quality, Atmosphere & Health argues that shift may already be showing up in our blood.
Alexander Larcombe and Phil Bierwirt…
