How are they making the hydrogen? You said green, so we're splitting water from the ocean I presume

What is powering this process? Nuclear? Wind? Solar? Hydro? Geothermal?

Nuclear would work if there was a plant nearby that needed to increase their base load so the hydrogen is just a byproduct. We need to build a lot of new nuclear anyway, so maybe this is something we will do. I'm not certain we have enough nuclear plants in ideal locations today. I'll have to look into this, but it being a common energy source due to excess generating capacity will be rare.

Wind works by the ocean and we are building some absolutely ridiculous turbines now (16MW just went up in China) but I wonder what fun we have in store with the trade winds being rather unreliable

Hydro is a blessing but we can't make that everywhere.

Geothermal has some potential in a few places. Still going to be an uncommon solution for a country/region

We probably want to be by the ocean, right? So the smartest solution is probably to use solar which we can put on land or even float on the sea.