The only mountains are the mountains of Al-Hajar that are located along the border with Oman, they rise up to an altitude of over 1 000 meters, touching the highest point with the Jabal Yibir mountain (1 527 meters). The oases produced dates, tomatoes and citrus fruits, it also practiced the breeding of sheep, goats, camels and cattle, along the coast fisheries has a discreet importance, including that of pearls. The main economic resource is oil, extracted from many field and coastal submarine deposits, there are also important deposits of natural gas. The 70% of the oil is extracted from Abu Dhabi, 25% from Dubai and the remainder from Sharjah and Ras al Khaimah. Regarding the industry the country has plants refining petroleum, chemical, metallurgical, mechanical and cement. The Emirates are also becoming an important financial centre in the Persian Gulf. Tourism is also constantly growing.