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The total volume of water on Earth is estimated at 1.386 billion km 3 (333 million cubic miles), with 97.5% being salt water and 2.5% being freshwater. Of the freshwater, only 0.3% is in liquid form on the surface. [ 2][ 3][ 4] Because the oceans that cover roughly 70.8% of the area of Earth reflect blue light, Earth appears blue from space ...
A map of the United States showing its 50 states, federal district and five inhabited territories. Alaska, Hawaii, and the territories are shown at different scales, and the Aleutian Islands and the uninhabited northwestern Hawaiian Islands are omitted from the map. The United States of America is a federal republic [ 1] consisting of 50 states ...
The Ogallala Aquifer (oh-gə-LAH-lə) is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. As one of the world's largest aquifers, it underlies an area of approximately 174,000 sq mi (450,000 km 2) in portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, New Mexico, and Texas). [1]
Water storage. Water storage is a broad term referring to storage of both potable water for consumption, and non potable water for use in agriculture. In both developing countries and some developed countries found in tropical climates, there is a need to store potable drinking water during the dry season. In agriculture water storage, water is ...
The Great Lakes ( French: Grands Lacs ), also called the Great Lakes of North America, are a series of large interconnected freshwater lakes in the east-central interior of North America that connect to the Atlantic Ocean via the Saint Lawrence River. The five lakes are Superior, Michigan, Huron, Erie, and Ontario, and they are in general on or ...
Do you want to know how the United States is divided into different regions? Check out this comprehensive list of regions of the United States on Wikipedia, where you can find the definitions, classifications, and maps of each region. You can also learn more about the history, culture, and geography of each state, such as Kansas, by clicking on the links in the list.
Drinking water quality in the United States. Drinking water quality in the United States is generally safe. In 2016, over 90 percent of the nation's community water systems were in compliance with all published U.S. Environmental Protection Agency (US EPA) standards. [ 1] Over 286 million Americans get their tap water from a community water system.
This is an alphabetical list of sovereign states and dependent territories in the Americas.It comprises three regions, Northern America (Canada and the United States), the Caribbean (cultural region of the English, French, Dutch, and Creole speaking countries located on the Caribbean Sea) and Latin America (nations that speak Spanish and Portuguese).