They actually are starting to do that: https://www.reuters.com/world/us/desalination-advances-california-despite-opponents-pushing-alternatives-2021-07-28/ htt

They actually are starting to do that: https://www.reuters.com/world/us/desalination-advances-california-despite-opponents-pushing-alternatives-2021-07-28/ https://www.reuters.com/world/us/desalination-advances-calif...