Just so this isn't forgotten, I think we have to ask _in reference to what exactly?_ Paper money and its supporting electronic banking systems cost energy and m

Just so this isn't forgotten, I think we have to ask _in reference to what exactly?_ Paper money and its supporting electronic banking systems cost energy and money too e.g. delivering cash to banks and other institutions, building and powering banks and ATMs, software costs in building and maintaining electronic payment systems, etc. I think it would be instructive to see how the costs compare.