Further to what I said in response to your story on 1L oil production, widespread production and use of hydrogen would change all of this, because it would have an effect of producing and distributing clean water by transportation running on hydrogen, given that all fuel cells must be specified to collect and preserve exhaust water as drinkable.
It would not be a big deal to manufacturers but highly beneficial to consumers.
And before you move on to food (Or in case you might have talked about already), see "Solein".
The input energy component of Solein is hydrogen.
This means human consumable food is produceable from solar via hydrogen.
This could be used to remove a large portion of the energy load of humanity from the conventional food chain, allowing the latter to recover.
Again we see a God-sign that community based solar hydrogen production is the way to go.
Like I said, all we need is the money to be issued to make it happen.
Money will continue to devalue in any case until it is done, so actually it's a no-brainer.