An observational study analyzing the effects of 300, 480, 3200, 7500, and 16,900 ppm CO2 on atmospheric (and soil) temperatures has determined “temperatures of atmospheric air in mesocosms [controlled outdoor experiments] with substantially higher CO2 concentration (ranging from 3200 ppm to 16900 ppm) were lower than that with the lower CO2 concentration (480 ppm)”. Image…

über New Experimental Evidence: The Atmosphere Cools As More CO2 Is Added…High CO2 ‘May Enhance Net Heat Loss’ — NoTricksZone