Of course if we all changed our lifestyles so that we don’t travel and lived in places that don’t need to be heated or air conditioned, ate only what we could grow.
I don't know if that was a response to my suggestions, Katie59, but it's rather an absurdly extreme interpretation..
There is plenty that can be done to use energy more efficiently and to produce it without resorting to fossil fuels or nuclear. Without making ourselves unduly uncomfortable.
I recall reading a thread on here about the use of tumble driers in the US. One of the mostly energy wasting forms of clothes drying... IIRC there were places where you weren't allowed to dry washing outside.. That raised my eyebrows somewhat. While that doesn't happen in the UK they are very commonly in use here. People need to be helped to think about what they are using. Perhaps apparently small changes could make a difference.
You sometimes see estimates of how much electricity is consumed by people leaving appliances on standby all the time; quite staggering really, and I'll hold up my hands and say we do it in my household, but what if they were programmed to automatically switch off when no-one was around?
Do we really need constantly 'on' digital clocks on half our kitchen appliances?
We squander energy.