New Breakthrough in Energy Storage – MIT Engineers Create Supercapacitor out of Ancient Materials::Constructed from cement, carbon black, and water, the device holds the potential to offer affordable and scalable energy storage for renewable energy sources. Two of humanity’s most ubiquitous historical materials, cement and carbon black (which resembles very fine charcoal), may form the basis for
It’s not so much about what citizens consume. Per capita energy use is not the same as average household energy use, it’s just the total energy consumed divided by population. So it will include industrial consumption.
Iceland produces plentiful electrical energy from hydro and geothermal power. Because electricity was so abundant it was very cheap, and because it was so cheap large energy intensive industry developed, such as aluminium production. Industry consumes the vast majority of electricity in Iceland.
Which makes sense. If industries didn’t have energy, citizens would be missing a bunch of other stuff…
The rest of your comment does make sense too.