CO2 Higher Today Than Last 2.1 Million Years - The Earth Institute - Columbia University
CO2 Past
International report on 2021 climate: record-high greenhouse gases, ocean heat, and sea level
Greenhouse gas emissions - Wikipedia
Mass Extinctions and Their Relationship With Atmospheric Carbon Dioxide Concentration: Implications for Earth's Future - Davis - 2023 - Earth's Future - Wiley Online Library
Do high levels of CO2 in the past contradict the warming effect of CO2?
CO2 on Earth now over 50% higher than pre-industrial times
Atmospheric carbon dioxide levels for the last 500 million years
Yes, There Has Been Progress on Climate. No, It's Not Nearly Enough. - The New York Times
2. How has climate changed? Australian Academy of Science
Antarctica's CO2 Level Tops 400 PPM for First Time in Perhaps 4 Million Years - Inside Climate News
CO2 Higher Today Than Last 2.1 Million Years - The Earth Institute - Columbia University
You Asked: Dinosaurs Survived When CO2 Was Extremely High. Why Can't Humans?