Where does Saudi Arabia's water come from?

Saudi Arabia has no permanent rivers, no natural lakes and very little rain. Yet millions of people in Riyadh, Jeddah and the Eastern Province turn on a tap every day and clean water comes out. Where does it come from? The answer is a system most people never see: the world's largest desalination industry turning seawater into drinking water, more than ten thousand kilometres of main pipelines pumping it across the desert, and ancient groundwater, some of it around 20,000 years old, that farms have been drawing down faster than nature can refill it. This is how it works, what it costs, and whether it can last. 0:00 The Impossible Question 1:08 A Country Built Against the Climate 2:56 The Machine That Separates Salt From Water 5:21 The Invisible Rivers 7:28 The Price of Every Drop 9:22 The Water That Cannot Easily Be Replaced 11:40 Can the System Last? 13:16 The Final Question Notes: the pipeline routes on the map are schematic. Footage filmed in Saudi Arabia shows its place in the corner (Riyadh, Jeddah, Al Khobar, AlUla); shots marked "Illustration" (military reverse-osmosis units, treatment plants, reefs, farms) were filmed elsewhere. Energy figures are plant averages. If you spot an error, please say so in the comments. #SaudiArabia #Desalination #Engineering