"Hindenburg made 17 round trips across the Atlantic in 1936 — its first and only full year of service — with ten trips to the United States and seven to Brazil."
Do you think Hydrogen is free or something? Worse, is that Hydrogen comes from water (at least that is the current cheapest way), meaning you get Oxygen and Hydrogen from it, but if you let the Hydrogen go, it will escape the atmosphere and be whisked away by solar wind (same with Helium). Then, you have just Oxygen, which is a green-house gas.
At least the ships release other chemicals in their emissions that decrease solar warming.
Shipping sector is a huge co2 emitter and this claims to cut "fuel burn and carbon emissions by 75 percent without any sustainable fuel breakthroughs".
As we ramp down fossils we this kind of thing would enable eg international agreements to limit and progressively lower shipping sector co2 credits over time.
We need to do this for all co2 emitter sectors since all the slices of the pie are fairly small so focusing on eg top-3 doesn't solve the problem.
