Will there ever be a global power grid?

Sometimes when I give talks about energy and carbon, I use the Energy Dashboard website to talk about live energy sources. We get to see how much electricity is coming from wind, nuclear and gas. I point out the red coal label, now joyously obsolete. And usually someone will hear about energy imports for the first time, seeing the electricity coming in from overseas.

The British Isles have a number of interconnectors with other countries, allowing us to share power and balance our respect...