Dubai Arabic: Dubayy, Gulf pronunciation: [dʊˈbɑj]) is the most populous city in the United Arab Emirates (UAE).[4] It is located on the southeast coast of the Persian Gulf and is one of the seven emirates that make up the country. Abu Dhabi and Dubai are the only two emirates to have veto power over critical matters of national importance in the country's legislature.[5] The city of Dubai is located on the emirate's northern coastline and heads up the Dubai-Sharjah-Ajman metropolitan area. Dubai is to host World Expo 2020.[6Dubai has emerged as a global city and business hub of the Middle East.[7] It is also a major transport hub for passengers and cargo. By the 1960s Dubai's economywas based on revenues from trade and, to a smaller extent, oil exploration concessions, but oil was not discovered until 1966. Oil revenue first started to flow in 1969.[8]