In Geological Terms, Today’s Atmospheric CO2 Concentrations Are Still Uncomfortably Low
By P Gosselin on 5. December 2020
Disaster was narrowly averted
Under 180 ppm atmospheric CO2 concentration, life on earth begins to die.
The earth came very close to that point not long ago during the Ice Ages (20,000 years ago). Then the planet warmed naturally, and an increase in atmospheric CO2 to over 200 ppm followed (new study here).
The earth saw CO2 levels of close to 8000 ppm in the past, i.e. about 20 times more than today. The following chart shows the earth’s atmospheric CO2 concentrations for the past 600 million years.
https://notrickszone.com/2020/12/05/in-geological-terms-todays-atmospheric-co2-concentrations-are-still-uncomfortably-low/
