Urban prairie (or urban grassland) is vacant urban land that has reverted to green space. The definition can vary across countries and disciplines, but at its broadest encompasses meadows, lawns, and gardens, as well as public and private parks, vacant land, remnants of rural landscapes, and areas along transportation corridors. If previously developed, structures occupying the urban lots have been demolished, leaving patchy areas of green space that are usually untended and unmanaged, forming an involuntary park. Spaces can also be intentionally created to facilitate amenities, such as , community gardens and wildlife reserve habitats.
Urban Brownfield land are contaminated grasslands that also fall under the urban grassland umbrella. Urban greenspaces are a larger category that include urban grasslands in addition to other spaces.
Areas may be cleared of buildings as part of a revitalization plan with the intention of redeveloping the land. In flood-prone areas, government agencies may purchase developed lots and then demolish the structures to improve drainage during floods. Neighborhoods near major industrial or environmental clean-up sites can be acquired and leveled to create a buffer zone and minimize the risks associated with pollution or industrial accidents. Additionally, residents of the city may fill up the unplanned empty space with urban parks or community gardens.Gallagher, John (2010). Reimagining Detroit: Opportunities for Redefining an American City, p. 24. Wayne State University Press. Governments and non-profit groups can also create community gardens and conservation, to restore or reintroduce a wildlife habitat, help the environment, and educate people about the prairie. Missouri Conservation News Detroit, Michigan is one particular city that has many urban prairies.
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