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United States Environmental Issues: The United States is the largest single emitter of carbon dioxide from the burning of fossil fuels. There is acid rain resulting from the air pollution of both the U.S. and Canada. Much of the western part of the country has limited natural fresh water resources, which requires careful management.
The US has the 2nd largest Exclusive Economic Zone of 11,351,000 km 2 (4,383,000 sq mi). By total area ( water as well as land), the United States is either slightly larger or smaller than the People's Republic of China, making it the world's third or fourth-largest country.
Learn about the United States, including American history, the president, holidays, the American flag, census data, and more. A-Z index of U.S. government departments and agencies Get contact information for U.S. federal government agencies, departments, instrumentalities, and government-sponsored enterprises.
List of U.S. states. This article lists the 50 states of the United States. It also lists their populations, the date they became a state or agreed to the United States Declaration of Independence, their total area, land area, water area, and the number of representatives in the United States House of Representatives.
United States Decorator Map. $16.95. About the US Map - The USA Map highlights the country's boundaries, states, and important cities. The map also includes major rivers, lakes, mountain ranges, national parks, and popular tourist attractions such as the Statue of Liberty, the Golden Gate Bridge, and Niagara Falls.
Map of the United States. Map of the Contiguous United States. The map shows the contiguous USA (Lower 48) and bordering countries with international boundaries, the national capital Washington D.C., US states, US state borders, state capitals, major cities, major rivers, interstate highways, railroads (Amtrak train routes), and major airports.
United Airlines is a major American airline that offers online flight check-in and MileagePlus rewards program.
