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http://www.formacion-profesional-a-distancia.com/world/index.htm
World

Location:

North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico

Geographic coordinates:

38 00 N, 97 00 W

Area:

total: 9,826,675 sq km

country comparison to the world: 3

land: 9,161,966 sq km

water: 664,709 sq km

note: includes only the 50 states and District of Columbia

Area - comparative:

about half the size of Russia; about three-tenths the size of Africa; about half the size of South America (or slightly larger than Brazil); slightly larger than China; more than twice the size of the European Union

Land boundaries:

total: 12,034 km

border countries: Canada 8,893 km (including 2,477 km with Alaska), Mexico 3,141 km

note: US Naval Base at Guantanamo Bay, Cuba is leased by the US and is part of Cuba; the base boundary is 28 km

Coastline:

19,924 km

Maritime claims:

territorial sea: 12 nm

contiguous zone: 24 nm

exclusive economic zone: 200 nm

continental shelf: not specified

Climate:

mostly temperate, but tropical in Hawaii and Florida, arctic in Alaska, semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest; low winter temperatures in the northwest are ameliorated occasionally in January and February by warm chinook winds from the eastern slopes of the Rocky Mountains

Terrain:

vast central plain, mountains in west, hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged, volcanic topography in Hawaii

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