@b78dc952 

Another aspect, this time without an easy workaround, is that the process of building the new infrastructure needs more traditional energy and materials on top of the current consumption. 

That is 100% valid point, because neither modern house insulation, nor PV panels, nor wind turbines can be made without energy and mined resources, and mining and processing of these also requires energy.

So anything mined and processed in say Germany will  be already 10x more CO2 intensive than e.g. in France as their electricity sectors are respectively based on coal and nuclear.

@fb6393a7