One of, if not the greatest flaws in the CAGW Theory is that it has its cause and effect reversed. CAGW is like claiming lung-cancer causes smoking. For the CAGW Theory to be valid, CO2 would have to increase, and then Temperatures would have to increase. The increase in CO2 would cause temperatures to increase. Problem is, that doesn't happen. Temperatures increase first and then CO2 increases. There is also no defined mechanism by which CO2 would increase before temperatures to pull the globe out of an ice-age/glaciation, or for CO2 to decline in advance of an ice-age/glaciation. The CAGW simply can't explain the majority of the observations in the geologic record.