So where does this leave us?
"Higher in the atmosphere, above about 12 kilometers [seven miles], however, these gases actually enhance the ability of the atmosphere to radiate heat out to space, thereby causing a cooling effect. As the amount of carbon dioxide increases, the upper atmosphere becomes cooler and contracts, bringing lower-density gas to lower heights."
One might also conclude that raising CO2 levels in the upper atmosphere cools the Earth. In any event, it does not explain fully why we have a recent cooling trend.
I can understand your eagerness to show that CO2 is a cause, the question remains though, is it the only cause, what does it cause and can we control climate solely by adding or subtracting sufficient quantities of CO2?