JR, you are a scientist and presumably you know the limits of science.  Of course the rudimentary concept of the greenhouse effect is first grade, but even the simple negative feedback mechanism of increased water clouds is hard to model.  What does the future hold?  As a scientist myself, I do not know what the climate will do, but it is pretty clear that substantially more CO2 will be present.  Nobody has viable pathways to practically halt or certainly not reverse atmospheric CO2 levels.  Lots of folks dance around and say pay attention to climate change but nobody has practical proposals for stopping the rise of atmospheric CO2.  So climate will do whatever it will do as CO2 concentrations continue to rise.  Northern Canada and Siberia could be much more attractive should temperature increases come to pass.  Perhaps the higher ocean temperatures and hence higher water vapor pressures will lead to more worldwide rain and perhaps the disappearance of the Sahara.  Who knows.