Submission of monitoring data (citizen observation)

Formed by residents and local organisations, the original focus of Greening Wingrove & Arthur's Hill was to address issues of litter and flytipping in Wingrove. The informal association later became a Cooperative (Community Interest Company) (1,2). Since its formation, the organisation aims to clean and green its part of Newcastle's West End through a diverse set of activities (15). These include the development of a former bowling green to become a community bike garden and community hub; encouraging locals' action on litter, promoting greening and food growing and local stewardship (4)

The Wild West End project encompasses the goals and visions of Greening Wingrove & Arthur's Hill. The project is aiming to explore local natural heritage, with a focus on species currently at risk such as bats, birds (swifts and house martins) and hedgehogs with the inclusion of residents, schools and local communities. Besides mapping the status of these species, habitat creation is also an objective to prevent the further decline of these at risk species in the area (15, 16)

A formerly derelict area, part of a 19th-century estate, the Zurich Square is a park, whose whereabouts are relatively new, and whose main function is to serve as the only park for the 700 children of the neighbourhood. Its location makes it also valuable, meaning that this park is situated in an industrial area and it contains trees planted in the 19th century (1).

The OrtoCollettivo project focuses on the creation of common spaces to grow local sustainable food while raising awareness about environmental challenges in cities. The project is based on teamwork: if there is work planned for today and someone cannot come to do that job, someone else will do it, with the ultimate benefit of everyone. It, therefore, stimulates common values about well-being, sustainable food production, and sharing time and activities collectively as a group (2). The initiative is ongoing and expanding, however in 2020 there were voices from the people living in the area that the poor maintenance of the terraces caused landslides and disturbed traffic. Nevertheless the NGO that initiated the intervention defended the project and suggested that the issue is caused by the lack of canals for the rain water to flow in. (8)

The Jardin des Plantes represents a space rich in nature in the heart of the city and also hosts the Opera Theater of Saint-Etienne (Ref. 2). In 2015, "A thematic urban commission (with the citizens' district representatives) is set up to enhance the "Jardin des Plantes" while keeping its wild side but with a controlled vegetation." For instance, the social center proposed a fitness trail and elected representatives propose a signage of trees, the integration of design, thanks to urban furniture and ephemeral works" (Ref. 1). Citizens requested that vegetation of walls be undertaken to "avoid the flourish of unattractive tags" (Ref. 1).

“Zagreb for Me” was an ambitious and comprehensive project launched in 2015 by the Zagreb Society of
Architects in cooperation with the Faculty of Architecture at the University of Zagreb and the City of Zagreb.
The goal of the project was to start a revitalization of public spaces through the realization of 17 urban
interventions in the whole city area at the same time. This distributed approach aimed to improve the general
“image of the city” and raise the quality of urban life in segments of housing, recreation, leisure and social
cohesion and revitalization of Zagreb's public spaces using public participation as a tool. This project aims to decentralize designed public spaces and draw attention to some forgotten city spots. At the same time, the project, created from a “bottom-up” initiative, establishes a new model of public participation as well as new forms of collaboration (Ref 1, 2, 3). The project "Zagreb for me" was created on the basis of Acupuncture of the city - an interdisciplinary approach and public participation, but it covers a wider urban space, ie it deals with public spaces throughout Zagreb. After the conducted urban-architectural tenders for the selected solutions, the realization is planned. Only one urban-architectural tender was conducted and the implementation of the project stopped there, but the project "Zagreb for me" was recognized as an example of good practice with the possibility of application in other cities. (Ref 5)

The Leonardo Garden was a community garden in an empty building site of 8th district of Budapest, that implementation was initiated by KÉK, the Contemporary Architectural Centre. (Reference 3)
The recultivation of two neglected, empty plots of land created one of the earliest community gardens in Hungary. Plants for consumption, spices, herbs and ornamental plants were planted. The 95 plots in the Garden were cultivated by young people, families and pensioners, but the Garden also served educational purposes, as it frequently received school groups. The Garden has hosted a number of public community and cultural, gastronomic and musical events, which were well attended by both the neighbourhood and the general public. The community garden was closed in March 2018 because the company that owns the land wanted to start construction on it. (Reference 5)

Along the 'Green Belt' (Grünen Band) in Bielefeld, which connects several urban grave lands with a continuous path, the organisation of Transition Town Bielefeld created a community garden to replace the permaculture garden in Bleichstrasse. (8) Thanks to its location, apart from the food production, the garden increases the environmental quality of the site serving as a green transition between the grey areas and the city. This function is in line with the overarching mission of Transition Town Bielefeld to promote energy and cultural transition in the city through different initiatives. (7) The community garden initiative was started in 2013 and welcome citizens to take part in the maintenance, planting and other gardening work of the garden or simply to enjoy its beauty since its launch in 2015. The project has a bigger goal towards sustainable development of urban infrastructures and social equity (1,2).

Athens' first vertical garden has been installed temporarily at the entrance to the City of Athens administrative building at 22 Liossion St during the city's first green cultural festival, the Green Design Festival in 2008. Such gardens have a positive impact on the environment as the plants trap carbon dioxide, produce oxygen, absorb harmful atmospheric pollution and reduce air temperature in summer, which assists in cooling the building's interior (Ref 1).

The botanical garden of Athens was reconstructed in 2004 to protect and maintain the biodiversity of the area. Covering a land of 1,860 sq.m., this Botanical Garden hosts over 2,500 different kinds of plants from all over the world and a rich variety of flora. All the plants and trees are protected in the park. The community also sends seeds all over the country to spread and maintain biodiversity throughout the region and hold agroecological events to increase the concern and educate the locals (Ref 1,3). The park also has a lake and a library inside it. (Ref 2)

Restructuring a public derelict land into few private vegetable and fruit gardens. The gardeners practice organic gardening making it more sustainable. This provides foods as well as increasing the soil fertility, and reduction of the soil erosion. This also creates some extra vegetable and fruit market in the city. 20 % of the food produced is donated to the food bank. The project is a community project which also helps to bring people together. Started in April 2012 (Ref 1,4). The project is one of the initiatives by the Greek municipalities allotting land to local citizens with the purpose of increasing food security for the underprivileged, educating the younger generation, and providing their citizens with a retreat from city life (Ref 3).