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You misunderstand, clearly. I have NOT said that the greenhouse effect does not exist! What I have said is that CO2 changes FOLLOW temperature changes, near as scientific measurements of glaciers, sediments, etc., can show. What I COULD have said is that CO2 is a minor greenhouse gas, that computer models showing it is significant are WRONG, going wildly off the path of any reasonable approximation, and thus the parameters must constantly be "revised," (read "fudged") in order to give the answers that the modelers have ASSUMED should result. In other words, they are scientific bullshit, to use a technical term.
Yes, Virginia, there is a Greenhouse Effect. But believing in a greenhouse effect does NOT mean that one must believe in manmade global warming or that CO2 is a significant element of that greenhouse effect.