Wetland of Repainville
"Formerly a 10 hectare market gardening site, the Repainville area is rich in environmental potential: ponds, streams, springs ... the aquatic environment is present everywhere. There is a great variety of fauna and flora. As an ecosystem that is particularly rare in urban areas, protection and recovery measures are being undertaken" (Ref. 1). The restoration of the wetland of Repainville is part of a flagship project of the municipality in terms of safeguarding biodiversity in urban areas. With arrangements allowing the public to walk there without harming the biological and natural diversity of the place, the site has an educational dimension in order in particular to make young audiences aware of the preservation of the ecosystem (Ref. 7).
Urban gardens Librino
The municipality of Catania has promoted an initiative that involves schools and non-profit associations, for which available space for urban gardens and horticulture has been provided. The main aim was to regenerate areas which were used abusively as landfills and for criminal activities. What will be produced must strictly conform to the principles of sustainable production, by using biological products and 0 environmental impact techniques. (Ref.1.)
Birkenhead park restoration
Birkenhead Park is one of the most important public parks in Britain. It is registered Grade I in English Heritage’s Register of Parks and Gardens of Special Historic Interest. In 2002 to 2007, funding was made available to restore the park, and now in 2017 a master plan aims to further “enhance and secure” the park. (Ref. 1, 2, 3). Birkenhead park is considered the first publicly funded park in the world, and not only holds the Grade I in English Heritage’s Register of Parks and Gardens of Special Historic Interest award but also the Green Flag award. (Ref 6, 7, 8)
Community Garden Les Hauts sement
The community garden "Les Hauts Sèment" is located in Rouen in the district of Lombardy, being the first community garden of Rouen animated by the city in 2011. It is "an educational garden which has been created and is maintained by the gardener in association with users wishing to invest in the association. It is supported by different animations" (Ref. 1 and 2, page 12).
Urban gardens of Poblenou
It is a community garden initiated by the autonomous assembly of the Poblenou neighborhood. It has changed location a number of times, eventually occupying the empty lot of demolished buildings. Over time the garden has expanded, taking over an adjacent empty space, as well as other yards in the neighborhood. The garden is not maintained for strictly productivity purposes, especially because much of its soil has been contaminated by a soap factory. It is, rather, used as a space for social encounter and knowledge sharing on planting and working with the earth on a communitarian basis (Ref 1 and description provided by CEU). This NBS is also part of a wider movement, the 15M movement in Spain (Ref 1), which had influence on the creation of larger similar global economic 'occupy' movements (Ref 5). Video for the opening party of the 8th self-managed squatted garden in the Poblenou neighborhood, Barcelona from April 11, 2020 shows that the idea of the first garden has lead to the creation of at least 8 of these gardens in the city (Ref 6).
Agrarian Park of Baix Llobregat
The Parc Agrari del Baix Llobregat is located in the floodplains of the delta and lower valley of the river Llobregat, in the Catalan county of Baix Llobregat, in a central position within the metropolitan area of Barcelona. The territory of the park (nearly 3500 hectares), includes a rich traditional agricultural activity and comprises fourteen municipalities totaling about 818,000 residents. It is protected by a specific planning instrument and managed by the Barcelona Provincial Council (Diputació de Barcelona) (Ref. 1 and 9). The park acts as a green lung for the metropolitan area of Barcelona and at the same time as a pantry for Mercabarna, the large wholesale market that provides food and drink to the inhabitants of Barcelona and surrounding towns, although there is also production that is exported (Ref. 10). The Agrarian Park is the only one in the world so close to a large city and it promotes specific programs to preserve the productive values of the agricultural space and promotes quality local products and local consumption. (Ref. 10)
Community gardens of city park Montjuic
The Hort de la Masia de l'Antic Jardí Botànic is located within the city’s largest inner-city park Montjuic. It has been founded in 2008 by an association of volunteers and is supported by public and private entities. The garden is co-management by members of the association and a professional gardener. Its major objective is the maintenance and reproduction of traditional landraces (Ref. 2). The task of the Citizen's Commission of Support of the Botanical Garden, presided by Pere Duran, was supported by the promotion work from the Botanical Institute. It was therefore a necessity generated by a local group of people (citizens) that developed into an implementation plan (Ref 1).
Social urban gardens of “Pla Buits” (Vacant Lots Plan)
This is a co-management initiative fostered by the City Council of Barcelona that aims to involve civil society in defining, installing and managing unused spaces across all districts of the city. The city council provides temporary use for public entities or non-profit associations to develop temporary uses and activities (from one year to three renewable years) in order to promote social activism and cohesion in the neighborhood. Most part of activities are social urban gardens (Ref 1). The initiative had 2 editions, with 12 projects in the first one (2013) and 5 projects in the second one (2015) (Ref. 12). One of the most popular projects is the community gardens such as ConnectHort, in Poblenou, dedicated to permaculture, which has allowed the restoration of an abandoned area through sustainable urban agriculture practices (Ref. 12). Another project, the Illa dels Tres Horts project in the Font de la Guatlla neighborhood, is an orchard where work is done with vulnerable groups and allow the recovery of vulnerable species (Ref. 12)
Operation Fil Vert to vegetate the streets
Fil vert aims to help green the streets in Normandy and raise awareness among citizens of the importance of being an actor of their daily life with regard to the occupation of public space. They aim to "embellish our streets, which are often devoid of vegetation, but also to train responsible citizens" (Ref. 7). "Operation "Fil Vert" was launched at Croix de Pierre (District) in Rouen in September 2013 to beautify and revitalize the district by mobilizing residents and tradespeople. It aims of installing planters in front of the inhabitants and the merchants (subject to obtaining the agreement of the owners in case of hiring), along the pavements, provided that it makes at least 1.40 M width to allow strollers and wheelchairs to pass." (Ref. 3)
Garden city of the 21th century (Fischbeker Reethen)
The Senate of Hamburg commissioned IBA Hamburg GmbH with the development of the project which aims at realizing two new, family friendly residential districts in Neugraben-Fischbek, the Fischbecker Heidbrook and Fischbeker Reethen, which will offer 3000 residential units in total. (Reference 10) Out of the two districts, Fischbeker Reethen is planned to be the "Garden City of the 21st century", which is why this NBS case focuses on that project. The Fischbeker Reethen project pays attention to sustainability, having a blue-green infrastructure (large green surfaces, waterways and a lake that serves as a basis for the rainwater management of the area). A further aim of the project is to create a new district for the growing city, that with its good infrastructure, public transport connection and educational offers will help the integration of refugees into German society. (Reference 12) The construction of the buildings followed by the green and recreational elements is will start in the second half of 2020, and the handover is planned for 2022 the earliest. (Reference 7)

