Space

It doesn't have potential. It's possible, but not practical. Using hydrogen for transport is snake oil - there are plenty of other industrial uses that should have much higher priority.

In order to meet the global industrial demand with green hydrogen, we would need to dedicate 3x the global renewable generation capacity from 2019 entirely to hydrogen production. That simply isn't going to happen - and that's just trying to deal with demand where there are no other options but hydrogen. If you start adding transport the demand will sky rocket. This is great for those in the business of selling hydrogen, terrible for everyone else.

Hydrogen is also an incredibly inefficient fuel, both in terms of burning it and in terms of energy cost to produce.

Methane is also not exclusively extracted through fracking. You're minimising the negatives of hydrogen and sensationalising the competition.

The other advantage of SLS is that these rockets are owned by the people, not private companies.

Yes because Boeing are totally a company for the people, they never take advantage of government contracts and always stay within budget.

Say what you will about SpaceX and the issues with the private sector and publicly traded businesses, SpaceX have revolutionised the rocket industry and driven costs down.