There is a chart in the link below which shows that in 2016 UK industry used a third of the energy industry used in 1970. If we are making twice as much stuff today as we did then you would expect us to be using more energy not less. It could be that we are using energy more efficiently and of course there is less heavy industry nowadays but I don't think that explains how we could be producing twice as much with a third of the energy.

They are just lying to us for the fun of it.

https://www.carbonbrief.org/five-cha...ergy-last-year