[JimSEA]

I’m one of those in the “all of the above” group. I doubt we know enough about the whole (climate) to separate out any one item and say it is THE cause. Of course it is a composite and the interactions among the many factors.

[mountainlion]

I’m one of those in the “all of the above” group

Me to. The sun supplies about half the heat to the earth. Radioactive decay in the core of the earth supplies about half also. CO2 concentration is about 0.0383% by volume (383 ppmv) or 0.0582% by weigh the atmosphere so how can it be the controlling factor?