Science

Fancy color renderings and everything.

It was an absurd idea then as it is now.

If you've got some magical "green" energy source to make hydrogen you might as well go all the way and turn it into traditional jet fuel for use in ordinary jetliners.

Of course there is no magical source of green hydrogen. This is just another dodge by the filthy fossil fuel industry. They want to distract us with shiny things as the world burns.

Besides, there's already a high speed carbon-free transportation system for routes less than 750 miles that's a lot more comfortable and more convenient than flying. It's called a train.



https://en.wikipedia.org/wiki/High-speed_rail_in_France