The fundamental chain of reasoning for the global warming hysteria is that fossil fuels put more CO2 in the air and that this increased CO2 causes warming by trapping more of the heat that would otherwise escape to space. One problem for the hysterics is that the long-term ice cores, some of which go back millions of years, and some other proxies, do not definitively even suggest that increases in CO2 lead to higher temps or vice versa. In a new study researchers attempted to extend the coverage period of the ice cores and examine methane and CO2 levels. The ice cores used went back about 3 million years and covered a period of substantial global cooling, leading to our current glacial cycles, which changed from a cycle period of about 40,000 years to one of around 100,000 years about a million years ago. The hysteric narrative has been that drops in CO2 were responsible for the cooling. Alas, the research finds no such thing. No significant change occurred in either methane or CO2 levels over this time. That in itself is interesting, as you would assume substantial vegetative and other changes as the earth cooled.
The stable levels of CO2 throughout multiple cycles of glaciation due to cooling and intervening warming is compelling evidence that the notion that CO2 is the earth’s temperature control knob clearly is wrong. Not that the hysterics will acknowledge this. (Nature Study)
