Revisiting CO2 emissions and global warming: Implications for society

This paper revisits the relationship between CO2 emissions and global warming by analysing over 60 million daily temperature observations from over 1600 global weather stations, with continuous records spanning from the pre-1900 era to 2024. Employing fixed effects models to isolate temperature trends from station-specific and seasonal variations, the study finds an overall warming trend of 0.0054°C per year after controlling for urban built-up areas. The analysis reveals a significant disconnect between the rise in annual anthropogenic CO2 emissions and the rate of temperature change. Notably, the period of the sharpest warming occurred in the early 20th century when CO2 emission levels were modest. In contrast, subsequent periods with rapidly accelerating CO2 emissions experienced slower warming or even cooling trends. These findings challenge the conventional assumption that human-induced CO2 is the primary driver of global warming, highlighting key gaps in our understanding and calling for a more critical approach in research, education, and a thorough reassessment of the premise underlying current climate policies.