W. Happer Professor of Physics Emeritus, Princeton University, USA L. Klett Education and Outreach Manager, The CO2 Coalition October 27, 2026 At current atmospheric concentrations C of carbon dioxide (CO2), there is less and less increase of the temperature T as more and more of the greenhouse gas CO2 is added. This law of diminishing returns is called saturation in … Continue reading Saturation of Warming by the Greenhouse Gas CO2