Hey, just giving my honest opinion here.
I’m no expert, but from what I understand it’s not so much about the a global shortage, but the a shortage in the area that need it. The countries/places that need these desalination facilities can’t afford to create them or don’t have a water resource to desalinate.
Secondly, transportation of water from these facilities would also be enormous in effort, scale, and resources as water is pretty heavy in mass quantity.
Thirdly, they don’t only mean water to drink, they also mean water required to irrigate land to maintain fertility which is a lot more than what you think it could be.
Lastly, and most sadly, different countries would have to work together to solve this global issue, but probably won’t. Hopefully in the future they can though!
I would ask a scientist or expert though for more accurate information. I hope this helps though and thanks for the question!
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