What is more important...? Water, or oil...? Until recently oil would have been considered one of the "elements...!" Nor money...! But even a poet, Joseph Brodsky, stated that there are five element: fire, water, earth, air and money. And not necessarily in this order. And oil does mean money. A lot of money. And Abu Dhabi would agree.
House of Water Abu Dhabi
Ludwig, Matthias, Prof.