yeah, all of that & nuclear too.
in the summer a careful planting of trees can make a big difference, and the location of windows.
in the winter, just wearing more clothes is or can be an important factor.
and don't forget the insulation levels and "paint jobs" on the buildings.
solar, nuclear, batterys, coal & oil doesn't have to shoulder the load alone.
we could dam more rivers, but i doubt that will happen.
