We're currently crossing seas, not just the channel. Nice little map with stats here: https://www.nationalgrid.com/our-businesses/national-grid-ventures/interc

We're currently crossing seas, not just the channel. Nice little map with stats here: https://www.nationalgrid.com/our-businesses/national-grid-ventures/interconnectors-connecting-cleaner-future 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_interconnects?wprov=sfla1 https://en.wikipedia.org/wiki/Carbon_nanotubes_in_interconne...