A nuke reactor and a distil the ocean water and boom more water than you will ever need. Isreal had done this for years we only have water shortages because those in charge do nothing to change it. And I use less than 5 gallons to shower with because im used to it after years if rving and dry camping. Me and my wife would share a 5 gallon bucket for our bucket baths. And its hard to over use water here since we all live out of tanks. But yes keep preaching and guzzling that cool aid.