Climate change has ingrained itself so deeply in the public consciousness that it’s likely an article of faith that the foundational science was all conducted, tested and confirmed decades ago. Surely to goodness, exactly how carbon dioxide (CO2) behaves in the atmosphere is “settled science”, right? That more CO2 emitted equals more heat and higher temperature is a cornerstone of the ruling scientific paradigm. And yet, finds Jim Mason, the detailed dynamics of how, when and to what degree CO2 transforms radiation into atmospheric heat are anything but settled. So much remains unknown that recent academic research inquiring whether CO2 at its current atmospheric concentrations can even absorb more heat amounts to breaking new ground in climate science. If it can’t, notes Mason, then further changes in CO2 levels not only won’t drive “global boiling”, they won’t have any impact on climate at all.