Dubai is the most populous city in the United Arab Emirates (UAE). It is located on the southeast coast of the Persian Gulf and is one of the seven emirates that make up the country. 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. Dubai has emerged as a global city and business hub of the Middle East. It is also a major transport hub for passengers and cargo. Dubai's oil revenue helped accelerate the early development of the city, but its reserves are limited and production levels are low: today, less than 5% of the emirate's revenue comes from oil. The emirate's Western-style model of business drives its economy with the main revenues now coming from tourism, aviation, real estate, and financial services. Dubai has recently attracted world attention through many innovative large construction projects and sports events. The city has become iconic for its skyscrapers and high-rise buildings, in particular the world's tallest building, the BurjKhalifa. Dubai provides a world class education and also enormous job opportunities. The most well-known universities in Dubai are American University in Dubai, Hult International Business School, Al Ghurair University, The American College of Dubai, University of Wollongong in Dubai, British University in Dubai offering courses in Business Administration, Engineering, Architecture and Interior Design. American University in Dubai is one of the six UAE universities featured in QS World University Rankings 2014/2015. In 2013 Synergy University Dubai Campus opened its campus in Jumeirah Lakes Towers being a first University in Dubai to located outside of Educational Zones.