Israel has led the way here: https://www.scientificamerican.com/article/israel-proves-the-desalination-era-is-here/ https://www.scientificamerican.com/article/i

Israel has led the way here: https://www.scientificamerican.com/article/israel-proves-the-desalination-era-is-here/ https://www.scientificamerican.com/article/israel-proves-the... They've had efficient desalination tech for several years now deployed in the country. My understanding is they use lava stone to make the membranes more efficient. 55 percent of their fresh water now comes from desalinated salt water.