It seems like a simple thing but there’s a big future in ocean desalination and it’s more important than you might think. There are great fears that extended droughts around the world will put a squeeze on certain areas and make them much harder to live. There are actually places in the world where drinking water is hard to come by. If the technology to make ocean desalination cheaper comes along you can count on those problems going away.
Ocean desalination is already a thing but it’s just too darn expensive to be widespread. When that cost comes down everything changes and all of a sudden you’re looking at water for everyone. The water could be sold cheaper or given away to those in need. It could be used to grow more crops to feed the hungry. The possible benefits are widespread and fantastic.