Do you think ammonia or hydrogen is more likely to be used for ships? At this time, I am leaning towards ammonia because storage and infrastructure is simpler.

Funny side note: While writing this post, I was doing a bunch of Google searches about ammonia, hydrogen, and blue vs green. Every single search returned a single ad from Saudi Aramco touting their blue ammonia and hydrogen capabilities. Incredibly depressing. The non-petro states need to hurry up and cover the center 80% of Australia with solar panels (Chilean Andes and North Africa too) to produce whatever green industrial inputs we need from "thin air". Maybe we can run a bunch of carbon sequestration machines too. In parallel, we can drive up carbon taxes.