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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]
The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely. Astronaut Jack Lousma taking a shower in space, 1974.
The Tariff Act of 1789 imposed the first national source of revenue for the newly formed United States. The new U.S. Constitution ratified in 1789, allowed only the federal government to levy uniform tariffs. Only the federal government could set tariff rates (customs), so the old system of separate state rates disappeared.
After a prolonged sting investigation, Secret Service agents swoop down on organizers and prominent members of BBSs in 14 U.S. cities including the Legion of Doom, conducting early-morning raids and arrests. The arrests involve and are aimed at cracking down on credit-card theft and telephone and wire fraud.
Crude oil production. Natural oil seeps such as this in the McKittrick area of California were used by the Native Americans and later mined by settlers. The history of the petroleum industry in the United States goes back to the early 19th century, although the indigenous peoples, like many ancient societies, have used petroleum seeps since ...
The history of the United States from 1945 to 1964 was a time of high economic growth and general prosperity. It was also a time of confrontation as the capitalist United States and its allies politically opposed the Soviet Union and other communist states; the Cold War had begun. African Americans united and organized, and a triumph of the ...
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 ...
Major figures such as Martin Luther King Jr., Malcolm X, and Rosa Parks [14] were involved in the fight against the race-based discrimination of the Civil Rights Movement. . Rosa Parks's refusal to give up her bus seat in 1955 sparked the Montgomery bus boycott—a large movement in Montgomery, Alabama, that was an integral period at the beginning of the Civil Rights Moveme