How does one transmit power across an ocean? It seems like we are just barely able to send DC across the English Channel with our current technology. Does a global power grid involve super lasers? Or some kind of huge plasma cannon?
[2] https://www.power-technology.com/features/featurethe-worlds-...
https://www.nationalgrid.com/our-businesses/national-grid-ve...
A few years ago I saw a talk by an industrial chemist, long distance power transmission over carbon nanotube cables. Looks like they're still not ready for primetime.
https://en.wikipedia.org/wiki/Carbon_nanotubes_in_interconne...