Miami (pronounced /maɪˈæmi/ or /maɪˈæmə/) is the 7th largest city in the United States, with a population of 5,414,712; it is the principal, central and most populous city of the South Florida metropolitan area. According to United Nations estimates, the Miami Urbanized Area was the fifth most populous urbanized area in the U.S. in 2000 with a population of 4,919,036, but in 2008 that number increased to 5,232,342, making it the fourth-largest urbanized area in the United States, behind New York City, Los Angeles, and Chicago.A well-known global city, Miami is a major center, and a leader in finance, commerce, culture, media, fashion, education, film, print media, entertainment, the arts and international trade.In 2010, Miami ranked as the United States' seventh top global city from all the cities in the country, and ranked thirty-third top global city in the world from all the cities in the world.In 2008, Miami was ranked as "America's Cleanest City" according to Forbes Magazine for its year-round good air quality, vast green spaces, clean drinking water, clean streets and city-wide recycling programs.Downtown Miami, South Florida's downtown, is home to the largest concentration of international banks in the United States, and is home to many large companies both nationally and internationally.For well more than two decades, the Port of Miami, known as the "Cruise Capital of the World" and "Cargo Gateway of the Americas," is the number one cruise passenger port in the world accommodating the largest cruise ships in the world and operations and is the busiest in both passenger traffic and cruise lines.