The physical geography of the United States is structured around major landforms that define both settlement and economic development. The Rocky Mountains dominate the western interior, while the Appalachian Mountains shape the eastern landscape. The Mississippi River system—one of the largest in the world—has historically served as a commercial artery, facilitating trade, agriculture, and industrial expansion. The Great Lakes, shared with Canada, represent one of the largest freshwater systems globally, reinforcing the nation’s agricultural and industrial capacity. Climatically, the United States encompasses nearly every major climate zone, including arctic (Alaska), tropical (Hawaii and southern Florida), arid desert (Southwest), humid continental (Midwest and Northeast), and Mediterranean (California). This climatic diversity directly supports a wide range of agricultural outputs—from corn and soybeans in the Midwest to citrus in Florida and vineyards in California—making the country one of the leading food producers worldwide. Politically, the United States operates as a federal republic composed of 50 states and a capital district, Washington, D.C. Its governance structure balances state authority with federal oversight, a system rooted in its 18th-century constitutional framework. Major metropolitan centers such as New York City, Los Angeles, and Chicago serve as economic, cultural, and financial hubs with global influence. Economically, the United States maintains the world’s largest nominal GDP, driven by diversified sectors including technology, finance, manufacturing, entertainment, defense, agriculture, and energy. Silicon Valley remains synonymous with technological innovation, Wall Street anchors global finance, and Hollywood continues to shape global entertainment culture. The country’s infrastructure—ports, railways, interstate highways, and aviation networks—supports high-volume domestic and international commerce. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
