Sorry if I wasn&#x27;t clear, I was saying that since they are real scientists, they are not abject idiots and running a linear regression on atmospheric CO2 vs mean global surface temperature.<p>I can&#x27;t tell you what to think or what models to select, but the rapid and sustained increase in temperatures over the past 30 years would suggest something is up, so I would at least focus on models that would have retroactively explained that rise.