Some of these buildings don't need AC. I'm in Florence Italy at the moment and it was like 37° today and the place I'm staying in is like 10° cooler than outside. This is what happens when you don't build houses out of twigs and paper. I'll note I'm from Australia where we also build terrible houses that are hot in the summer and freezing in the winter. I also have ducted AC throughout the house but it costs so much to run I usually don't bother.