An oasis is a fertile area of desert land that forms when groundwater lies close enough to the surface to form a spring or to be reached by wells, providing it with a permanent supply of fresh water. Oases vary in size from a pond with a group of date palms to the oasis cities of the deserts of Arabia. Because oases allow travelers, most importantly traders, to replenish their food and water supplies, they are of great strategic and economic value. What Nordic country has a so-called oasis? Discuss