So the last post had a neat way of looking at it, but I improved on the graphic demonstration.
First let us remind ourselves of the pseudoscientific greenhouse effect:
A fancy diagram with straight lines and numbers on it seems to really be able to confuse, and convince, pseudoscientists into believing anything.
Now let’s look at this realistically in terms of power and heat:
So, we have heat (power) coming in from the Sun (left cord). This warms up the ground surface (supplies power to power bar). Heat comes out of the surface and goes into the atmosphere (power goes from the plug to the black extension cord). Heat then goes from the atmosphere back to the surface (power goes from the black extension cord back into the power bar). This doubles the amount heat (power) provided by the Sun (input cord). If you plug in another extension cord to one of the free receptacles, you will have twice the power.
Of course, that doubled heat or power should now go back into the atmosphere (first black extension cord), and come back and cause more heating again. This is of course ignored for convenience…the process arbitrarily stops at one cycle because if you simply follow the logic, the scheme betrays its sophistry. Hence, ignore the logic.