United States, an officially United States of America is a federal republic of 50 states. The country embraces some of the world’s largest urban concentrations as well as some of the most extensive areas that are almost devoid of habitation. It is the fourth largest country in the world in area sharing wide varieties of culture and climates. The nation’s wealth is partly a reflection of its rich natural resources and its enormous agricultural output, but it owes more to the country’s highly developed industry. The United States also impinges on the global economy as a source of and as a destination for investment capital. Its physical environment ranges from the Arctic to the subtropical, from the moist rain forest to the arid desert, from the rugged mountain peak to the flat prairie.

The contiguous United States is home to a wide variety of climates. However, in general it has a continental climate, with cold winters and hot summers. The overall climate in the United States of America (USA) is temperate, with notable exceptions. Alaska has an Arctic tundra climate, while Hawaii and South Florida have a tropical climate. The Great Plains are dry, flat and grassy, turning into arid desert in the far West.

Top Cities in USA

New York, Los Angeles, Chicago, San Francisco, Boston, San Diego, Washington DC, Denver, San José

Economy

Constituting less than 5% of the world's population, Americans generate and earn more than 20% of the world's total income. America is the world's largest national economy and leading global trader. The process of opening world markets and expanding trade, initiated in the United States in 1934 and consistently pursued since the end of the Second World War, has played an important role in the development of American prosperity. American real incomes are 9% higher than they would otherwise have been as a result of trade liberalizing efforts since the Second World War.

About Longdom

Longdom organises leading international conferences and webinars and is instrumental in bringing together experts and beginners for cooperative and effective research-oriented discussions. The goal of Longdom conferences is to bring together scientists at every level from different disciplines to understand and discuss during programmed topic sessions and informal gatherings. Longdom conferences will showcase innovative, cutting-edge research on the fundamental roles in addressing the challenges and translational research from academia to industry. All these opportunities will support professional growth of younger scientists that will promote future collaborations and enhance participation and contribution to their exciting research work.