“If the start of a rise in mean global temperature occurs simultaneously with increased emissions of CO2 from industrialization, it does not mean that the latter caused the former.”
In the ice core data, the increase in CO2 lags; ie FOLLOWS the temperature increase.
True but very slowly. If the ocean temperature rises 1C per century then CO2 rises 5-10 ppm over the same time period. We get 2-3 ppm rise per year. That is clearly not from warming oceans or natural methane breakdown or anything like that.