M0nica
I think people are forgetting the downsides of the 'old' days. Chilblains, increased numbver of colds and respiratory diseases, smog from all the coal fires. Smog killed my grandmother. yes, I know air is polluted today, but the sheer constant filth of the days before smoke control orders has to have been experienced to be believed - and I did experience it.
In cold houses walls streamed with condensation, excarbating respiratory illnesses, Old people dying of hypothermia.
As far as I am concerned, I can see nothing to be nostalgic about, living in cold, damp uninsulated houses,with condensation streaming down kitchen and bathroom walld, with a permanent cold and red swollen knuckles and toes, sometimes the skin on the joints was broken and raw.
I'm not being nostalgic about anything although our North facing two up two down unheated stone cottage in Scotland was pretty dam' cold at times!
But- we are consuming very much more enerģy than we did then, not just central heating but domestic gadgets, tv, more of us have washing machines, charge our phones, laptops or tablets etc etc etc
I have made some concrete suggestions but if we are serious about saving energy we also need to be prepared for a lifestyle change.