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The Environmental Protection Agency is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order.

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Florida panther. The panther is one of the most endangered mammals in the country, according to the Defenders of Wildlife. In 1972, President Nixon declared current species conservation efforts to be inadequate. He called on the 93rd United States Congress to pass comprehensive endangered species legislation. Congress responded with the Endangered Species Act of 1973, which was signed into law by Nixon on December 28, 1973

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The National Park Service is an agency of the federal government of the United States that manages all national parks, many national monuments, and other conservation and historical properties with various title designations.

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The Sun Belt is a region of the United States generally considered to stretch across the Southeast and Southwest. Another rough definition of the region is the area south of the 36th parallel

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The Rust Belt is a region of the Northeastern and Midwestern United States that has been experiencing industrial decline starting around 1980. It is made up largely of the Great Lakes Megalopolis, though definitions vary.

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Eleven million people migrated from rural to urban areas between 1870 and 1920, and a majority of the twenty-five million immigrants who came to the United States in these same years moved into the nation's cities. By 1920, more Americans lived in cities than in rural areas for the first time in US history.

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The Great Migration, sometimes known as the Great Northward Migration or the Black Migration, was the movement of 6 million African Americans out of the rural Southern United States to the urban Northeast, Midwest and West that occurred between 1916 and 1970.When World War I broke out in Europe in 1914, industrialized urban areas in the North, Midwest and West faced a shortage of industrial laborers, as the war put an end to the steady tide of European immigration to the United States.

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The city of Los Angeles has the nation's worst air quality when it comes to ozone Pollution, and the counties that surround it are some of the worst nationally as well, according to a new study.
The American Lung Association just released its annual State of the Air report, which finds that more than 40% of Americans live within areas with unhealthy levels of ozone or particle pollution. Southern Californians fared especially bad.

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Hurricane Katrina was a large Category 5 Atlantic hurricane that caused over 1,800 deaths and $125 billion in damage in August 2005, particularly in the city of New Orleans and the surrounding areas. It was at the time the costliest tropical cyclone on record and is now tied with 2017's Hurricane Harvey.

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The Dust Bowl was the name given to the drought-stricken Southern Plains region of the United States, which suffered severe dust storms during a dry period in the 1930s. As high winds and choking dust swept the region from Texas to Nebraska, people and livestock were killed and crops failed across the entire region.

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Promontory, Utah, USA Transcontinental Railroad 

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Promontory, Utah, USA Transcontinental Railroad 

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On May 10, 1869, the presidents of the Union Pacific and Central Pacific railroads meet in Promontory, Utah, and drive a ceremonial last spike into a rail line that connects their railroads. This made transcontinental railroad travel possible for the first time in U.S. history.

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In sociology, an ethnic enclave is a geographic area with high ethnic concentration, characteristic cultural identity, and economic activity. The term is usually used to refer to either a residential area or a workspace with a high concentration of ethnic firms.

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Political Machine in U.S politics, a party organization, headed by a single boss or small autocratic group, that commands enough votes to maintain political and administrative control of a city, county, or state. The rapid growth of American cities in the 19th century, a result of both immigration and migration from rural areas, created huge problems for city governments, which were often poorly structured and unable to provide services. In those conditions, political machines—such as Tammany Hall, run by boss William Magear Tweed (1823–73) in New York City—were able to build a loyal voter following, especially among immigrant groups, by performing such favours as providing jobs or housing.

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Urban sprawl refers to the expansion of poorly planned, low-density, auto-dependent development, which spreads out over large amounts of land, putting long distances between homes, stores, and work and creating a high segregation between residential and commercial uses with harmful impacts on the people living in these areas and the ecosystems and wildlife that have been displacedUrban sprawl refers to the expansion of poorly planned, low-density, auto-dependent development, which spreads out over large amounts of land, putting long distances between homes, stores, and work and creating a high segregation between residential and commercial uses with harmful impacts on the people living in these areas and the ecosystems and wildlife that have been displaced

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Millions of wild buffalo once roamed the American West. In the United States, "bison" and "buffalo" are often used interchangeably, although bison is the most accurate term, as "buffalo" technically refers to species from Africa and Asia, such as the cape and water buffaloes.

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The U. S. Army established nine principal forts in Kansas during the 19th century. The mission of the frontier forts before and after the Civil War was to escort freighters and settlers using the Santa Fe and Smoky Hill trails, to protect railroad construction crews, and to serve as a staging place for war if the need arose.

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President Abraham Lincoln signed the Homestead Act on May 20, 1862. On January 1, 1863, Daniel Freeman made the first claim under the Act, which gave citizens or future citizens up to 160 acres of public land provided they live on it, improve it, and pay a small registration fee.

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Indian Wars Books, Marbank Street, Wake Forest, NC, USA

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Indian Wars Books, Marbank Street, Wake Forest, NC, USA

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Indian Wars Books, Marbank Street, Wake Forest, NC, USA

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The Indian Wars was a war that lasted 1622 to the late 19th century and killed over 21,000 people, 69 percent was native Americans and the 31 percent was Army and civilians ,the main causa was Manifest Destiny and people move west.

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the United States commenced building a canal across a 50-mile stretch of the Panama isthmus in 1904. open in 1914 , oversight of the world-famous Panama Canal was transferred from the U.S. to Panama in 1999.

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Klondike Gold Rush National Historical Park, 2nd Avenue South, Seattle, WA, USA

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Klondike Gold Rush National Historical Park, 2nd Avenue South, Seattle, WA, USA

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Klondike Gold Rush National Historical Park, 2nd Avenue South, Seattle, WA, USA

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The klondike Gold Rush started in 1896 and end in 1899. It attracted over 900,000 people with hopes and dreams to get rich but only around 30,000 found some type of gold.