Posted by kristi on 23 Feb 2023 in General Information, The Essentials For Life (As We Know It), Carbon Dioxide
Earth’s Atmospheric Carbon Dioxide (CO2) Concentrations Over Time The previous post covered the fall of atmospheric carbon dioxide (CO2) from 97% [970,000 parts per million (ppm)] 4.5 billion years ago, to around 0.4% (4,000 ppm) 500 million years… more »