relazione in inglese sugli stati uniti

The United States of America (often shortened to the United States, USA, U.S. or colloquially America) is a country of the western hemisphere comprising fifty states and numerous territories. Forty-eight contiguous states lie in central North America between the Pacific and Atlantic Oceans, bound on land by Canada to the north and Mexico to the south; Alaska is in the northwest of the continent with Canada to its east, and Hawaii is in the mid-Pacific.[2] The United States is a federal constitutional republic; Washington, its capital, is coextensive with the District of Columbia (D.C.), the federal capital district[3] At over 3.7 million square miles (over 9.6 million km²) and with over 300 million people, the United States is the third largest country by both total area and population. [4] With a gros domestic product(GDP) of over $13 trillion, the U.S. has the largest national economy in the world.[5] GDP per capita ranks first among the larger economies of the world, and third eighth overall, depending on the measurement. The product of large-scale historical immigration and home to a complex social structure[6] as well as a wide array of household arrangements,[7] the U.S. is one of the world's most ethnically and socially diverse nations.[8]