I mean it’s slightly better. The worst effect is still by cloud seeding at flight height. That doesn’t go away with hydrogen.
But to my understanding could even be turned into a beneficial effect otf you changed the flight height of planes, seeding clouds further down. But that makes them less efficient, which isn’t great for hydrogen.
So a better strategy might be to mandate lower flight height and e/bio fuels.
At the moment it’s 8 episodes and one season. But it took them that season to get to the grand line. So if they want to make it to the end, we are looking at at least 10 seasons minimum. But Netflix will cancel it after a few seasons anyway.