Wonderful. Now tell us how you make, compress and/or liquify the hydrogen. I hope not steam reforming natural gas, which produces CO2 in the process.
Yet another stupid boondoggle. All of aviation isn’t exactly low hanging fruit for CO2 reduction (around 2 to 3% of human caused CO2 emissions). That’s if you are silly enough to believe, without any definitive evidence, that CO2 emissions from human activity are a problem.
We are in an interglacial. What we think of as “normal” climate has only been around for 11,000 years in the current interglacial. Enjoy the warmth, the ice will be back soon enough and then things will get grim.
Realise also that most academic “scientists” who tell you all this is a problem would make good livings as used car salesmen.
Best way to handle hydrogen as a fuel is to store it attached to nanoscale backbones of carbon atoms. Stores at room temperature, dense and easy to handle. I’m going to call it Avgas and Jet A1.