Small Greenhouse Effect

JoNova reminds about a "forgotten paper that deserves more attention: Idso 1998":

• Sherwood Idso does calculations from eight completely different natural experiments which all arrive at similar figures. In short, he reviewed 20 years of work to arrive at a prediction that if CO2 is doubled we will get 0.4°C of warming at most, and even he admitted, it might be an overestimate.

I have come to the same conclusions based on simple models based on observation. In short: Whatever the "greenhouse effect" may be, it appears to be too small to be possible to detect.

One way of expressing this is to say that the "greenhouse effect" has no effect and as an effect without effect does not qualify to be termed "greenhouse effect" in scientific literature.