Infrastructure and Government Policies of the USA
OVERVIEW OF THE COUNTRY.
The United States of America (USA or U.S.A.), commonly
referred to as the United States (US or U.S.A), America, or
simply the States, is a federal republic consisting of 50 states
and a federal district. The 48 contiguous states and the federal
district of Washington, D.C. are in central North America
between Canada and Mexico.
316 million people, the United States is the fourth-
largest in total area, the fifth largest in the contiguous area
and third in population. It is one of the world's most ethnically
diverse and multicultural nations, the product of large-scale
immigration from many countries. The geography and climate
of the U.S. is also extremely diverse, with deserts, plains,
forests, and mountains that are home to a wide variety of
wildlife.View entire presentation