Don, There are many problems I see with the anthropocentric theory of climate change. First, we do not know enough about the earth’s primary heat source. 11 year solar cycles are well known and measurable over the past century. Sunspot activity, a harbinger of electromagnetic activity and radiation have been observed somewhat longer. But consider this: Hertz only discovered EMF and the means to detect it about a hundred years ago. We do not know and could not measure longer range solar cycle activity and energy outputs. Even if we could, much of the solar fluence is at least damped by the earth’s magnetosphere which we have only known about for 70 years, let alone studied in detail in deep space probes. So we really know little to nothing pertinent about long term solar energy cycles and nothing at all about era-scale energy fluence changes.
Next, the carbon cycle is far more complex than most models predict. Atmospheric CO2 concentrations are very low. CO2 is highly dissolved in water as bicarbonate and is easily converted to and sequestered in minerals that make up much of the earth’s surface mineral base, such as limestone, marble and other minerals. It is also sequestered in living things, such as plants as cellulose and other carbohydrates, as well as animals. Much of our surface and ground water contains copious amounts of calcium carbonate which we regularly scrape off our plumbing or chemically convert with our water softeners. When plants and animals die, their converted carbon eventually becomes oils and gas or is burned on the surface. The oils and gas are sequestered and over millennia become stored solar energy fields and in a far more efficient but slower cycle than PV cells with many orders of magnitude energy density.
That scratches a surface: We do not know the true energy reaching the surface over geologically important time frames and because of this cannot predict in a meaningful manner the anthropomorphic impact on climate, if any. We also do not know if the rate of energy capture is constant or how it varies at the planet surface over geologically meaningful time frames.
We do not know the rate of conversion from atmospheric CO2 to sequestered CO2 in terms of mineralization of dissolved CO2, photochemical conversion of CO2 to carbohydrate, bioconversion of carbohydrate to organic oils, and sequestration of those oils as fossil oils and bioconversion of organics to methane gas over geologically important time frames.
Finally, as energy and matter are conserved, the stored captured energy in fossil fuels is stored solar energy and by using that stored energy we are re-converting it to CO2 which is a closed cycle and will/may be re-sequestered either in minerals or oil fields again. Unless we continue to burn our foodstocks, bypassing the fossilization of that fuel.