ancient atmospheric CO2

Ancient atmospheric CO₂ levels refer to the concentration of carbon dioxide in Earth's atmosphere over geological time scales, often millions of years ago. These fluctuations were influenced by natural processes like volcanic eruptions, weathering of rocks, plant life, and Earth's climate. Studying ancient CO₂ helps scientists understand how Earth's climate has changed over time and the role of greenhouse gases in warming or cooling the planet. By examining ice cores, sediments, and other geological records, researchers can reconstruct past CO₂ levels, providing context for current climate trends and the impact of human activities on atmospheric composition.