Lithium seawater extraction is much more likely than a green hydrogen economy! In practice, it gets more practical as you couple lithium extraction with other processes, like desalination. In fact, if you manage to get hydrogen production from seawater going, extracting Lithium from the byproducts will be quite economical.
> You have swallowed myths and fantasies of your own.
I pointed it out only as a response to your equally absurd statement that hydrogen fuel is "fully renewable and in abundance". Clearly, Lithium fits just as well.
> you are unwittingly admitting that hydrogen fuel cells are a viable technology for transportation purposes.
Certainly not. Fuel cells could certainly become practical for transportation, but HYDROGEN is not, with or without use in a fuel cell, and that's true for the several reasons I've already very clearly outlined.