“Since water vapor is the most effective greenhouse gas, the climate modelers claimed Earth might heat by 5 or even 10 degrees C.”
Referring to water as a pollutant would not sell to even the thickest headed of us (Marxists excluded). Perhaps that’s why they’re making “carbon” the boogieman. Sounds like demon coal.
Happily, water vapor will also furnish much if not all of the shielding needed to keep an atmosphere warming from CO2 effects from running away. Clouds.
The thing that clouds have more trouble holding back is actual escalation in the radiation of the sun. Nobody yet has devised a way of looking below the surface of that dense, fiery ball, to my knowledge, and there could not be, unless there were a way to “x ray” it with something like neutrinos. So if solar cycles are waiting to spring on us again, we would not know until they happened, though past cyclical behavior could be a clue.
High CO2 is more an effect than a cause in these cycles. If the solar radiation increases, the ocean will give up the less soluble CO2, like a warm Coke going flat. If it decreases, what was pointed out in the referenced article could happen, with the ocean soaking up CO2.