Urban decay
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Urban decay is the sociological process by which a previously functioning city, or part of a city, falls into disrepair and decrepitude. There is no single process that leads to urban decay.
Urban decay in Poznań, Poland. The tiles are cracked and covered in graffiti.
Many areas that suffered population decline from the 1970s still have signs of urban decay, such as this derelict building in Birkenhead, Merseyside.
Pruitt–Igoe public housing, St. Louis, Missouri. This urban renewal project was built in the 1950s; it failed and was razed in the 1970s.
Greyfield land
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In the United States, greyfield land is a formerly-viable retail and commercial shopping site that has suffered from lack of reinvestment and been superseded by other shopping sites elsewhere. These p
Urban decay
…Elevated levels of pollution (e.g., air pollution, noise pollution, water pollution, and light pollution) Desolate cityscape known as greyfield land or urban prairie Since the 1970s and 1980s, urban decay has been a phenomenon associated with some Western cities, metropolitan areas, and megalopolis's…
A greyfield in Richmond, California, is used to expand a Kaiser Permanente hospital.