Researchers of the MIT developed a new solar powered passive water desalination system. They claim the system is low in maintenance and could produce water thst is cheaper than tap water.
This could be big for certain desert states and communities, who struggle with access to fresh water.
No, that is a problem but not the biggest. The biggest is energy cost. And in reality brine is just watered down salt, just dry it some more and you have something more to sell
The trick is more that brine corrodes and clogs leading to high maintenance costs. But if needed it’s solveable.