C
calorific
If fuel became prohibitively expensive then I suspect you'd put a jumper on. Anyway, it's about educating the masses. A bit like nobody smokes anymore due to a persistent cough, er, campaign and there's no complaint over thatTrying to persuade people to wear warmer clothing indoors seems an obvious solution. I suspect that many of us on here are wearing a light shirt and relying on the ambient heat from the heating systems to keep us warm, possibly with the house doors open and maybe a window or two open to allow fresh air.
I suspect like a lot of people if the government were to try and persuade me to do any thing I'd do the opposite,turn the heating up,the gas is not rationed yet.