Sheikh Maktoum built his showcase city in a place with no useable water. None. There is no surface water, very little acquifer, and among the lowest rainfall in the world. So Dubai drinks the sea. The Emirates’ water is stripped of salt in vast desalination plants around the Gulf – making it the most expensive water on earth. It costs more than petrol to produce, and belches vast amounts of carbon dioxide into the atmosphere as it goes. It’s the main reason why a resident of Dubai has the biggest average carbon footprint of any human being – more than double that of an American.