Perhaps.
That seems to be speculation. There has been other speculation as well, for the past thirty years. . .
I have heard that a lot of clean energy tech is being purposely suppressed, patents have been bought up and shelved for decades, or only used by governments, for. . . reasons, which I will not get into.
If that were, er. . . released, then, desalinization of sea water would be possible. A lot of folks have no idea how many tons of resources would be unlocked from ocean water were it to be processed with unlimited free energy. . .
That would be much cheaper than mining comets and asteroids. And? IMO, there are very powerful folks that know all of this, but they don't want to have a planet with this many people benefiting from that. . . . it would be a threat to the natural world. So they need to limit growth, or even start to decrease the population before they release that genie from that bottle first.
They are already approaching the time, when, they will be able to extend human life, and youth, much longer than most folks would ever imagine. So, obviously, they believe more control needs to be exerted over society before they can release that tech. And old sources of energy are running low. . . .