From a new article in Geophysical Research Letters:
The uncertainties in climate change lie in (1) clouds, and (2) the carbon cycle, not in CO2 or how greenhouse gases interact with infrared radiation emitted by the Earth and its atmosphere. Because the latter are very amenable to fundamental physics, the kind of stuff physicists have spent 300 years getting good at -- read Chapters 2-4 in Pierrehumbert's textbook -- the Planck Law, energy conservation via the two-stream equations, and numerical solutions to the underlying PDEs using the HITRAN spectroscopic database.
Climate contrarians (quote-unquote) never get this. They want only to argue about CO2.