Co-planning (e.g. stakeholder workshops, focus groups, participatory mapping)

In 2020, the Metropolitan City of Cagliari launched a project to enhance flood resilience and ecological integrity in the Mannu-Cixerri river system in southern Sardinia. The river traverses several communes within the metropolitan area, ultimately feeding into the Santa Gilla Lagoon, a vital wetland ecosystem west of the city.
The project, with a budget of €21 million, focuses on three key communes: Assemini, Decimomannu, and Uta. Rather than solely emphasizing structural flood defenses, the initiative integrates nature-based solutions (NbS) to mitigate flood risks while restoring riverine ecosystems. The Metropolitan City of Cagliari, in collaboration with the Sardinian Regional Public Works Department, is responsible for its implementation.
Key interventions include reinforcing and revegetating embankments, improving water flow along the Rio Mannu, and constructing new levee sections in a manner that enhances natural water retention. Additionally, the project involves upgrading bridges to facilitate better floodwater management. These measures align with the Sardinian Flood Risk Management Plan (PGRA) and aim to reduce flood hazards while promoting ecological benefits.
The project timeline began with a two-year preparation phase for the Preliminary Design Document, followed by a year-long tendering process for construction. These efforts represent a crucial step toward long-term flood resilience and environmental sustainability in the region. (Ref. 1, 2, 3)

The Metropolitan Linear Park is a project initiated by the national government of Bolivia, funded by the Inter-American Development Bank (IDB) (1-8). The proposed park will be located along a disused railway corridor between the cities of La Paz and El Alto, spanning 18.2 km (8, p. 8). The project involves the construction of a linear park, divided into five sections, each with distinct objectives, uses, and designs (8, p. 9). This large-scale initiative aims to improve access to public spaces in La Paz and El Alto, enhance connectivity between the two cities, protect surrounding biodiversity and natural spaces, and strengthen resilience to and mitigate the effects of climate change (3 & 8, pp. 11-12).
To achieve these goals, the project design includes outdoor sports and recreational facilities, pedestrian and cycling circuits, as well as the restoration of parks, squares, and public spaces adjacent to the park corridor (8, p. 9). Some features include balcony corridors, flower and food-producing urban gardens, and viewpoints (5). The project also plans for the re-vegetation of the area with native species and aims to stop the environmental degradation of surrounding natural environments, such as the Pura Pura forest, which has been suffering from ongoing deforestation and waste dumping (8, p. 9). These efforts are expected to increase and support biodiversity in the area (7 & 8, p. 12).
Additionally, the project emphasizes social inclusion, with policies designed to incorporate women, indigenous populations, and persons with disabilities (8, pp. 7-8). The park is intended to raise awareness about climate change and biodiversity, ultimately improving the quality of life and health of nearby residents and the citizens of La Paz and El Alto (8, p. 13).

A new park is being planned for the Cypress Shores area in Mobile (Ref 1). Five civil engineering students from the University of South Alabama contributed to the design of the park (Ref 1). This collaboration offers students practical experience while providing city designers with innovative ideas for the site (Ref 2). The design emphasizes sustainability and cost-effectiveness (Ref 3). The project will feature a small park and boat launch on a 5.6-acre plot (Ref 1) located within a residential neighbourhood (Ref 3).
The park's societal goal is to improve public access to Halls Mill Creek, giving the community a new way to enjoy the waterway, and this focus aligns with the Mobile Bay National Estuary Program (MBNEP) goals (Ref 3). Historically, the property was used as a shipyard with a nearby railroad crossing (Ref 1), marking its transition from an industrial site to a public park.
Several amenities have been identified for the park’s development, including a boat ramp and kayak launch, a boardwalk adapted to sea-level rise, a pavilion and gazebo designed for flood resilience, a wetland nature trail with solar lighting and educational signage, and composting toilet restroom facilities (Ref 3). An armoured shoreline will be implemented to withstand medium water currents, and wave action will be constructed. Additionally, a living shoreline will be restored with local plants (Ref 3). While the project is still in its preliminary design phase, the timeline for completion is estimated at 12 to 18 months (Ref 1). The designers highlighted a potential trade-off, noting that an influx of visitors to the park could disturb the surrounding residential area (Ref 3).

The Recovery of Cienaga Juan Polo project is primarily aimed at reopening the natural mouth of the Manzanillos to restore water flow between the sea and the Juan Polo coastal wetland, which has been affected by human activities leading to high salinity and water stagnation issues (ref 2). The project is led by Fundacion Serena del Mar. Environmental and social sustainability are core components of the project design, which has included extensive community consultations since 2013. These consultations have resulted in agreements covering employment opportunities, education, and infrastructure development (ref 2). Key implementation activities include the reforestation of mangroves and targeted interventions to address ecological degradation, such as increased salinity, water stagnation, and biodiversity loss (ref 2). The project also seeks to enhance the quality of life for surrounding communities by restoring traditional economic activities, particularly fishing, and integrating sustainable urban planning elements such as canals, sluices, and navigable waterways. These features are designed to support the development of a "blue corridor" for aquatic mobility within Serena del Mar (ref 2, 3). In addition, it also contributes to local capacity building through environmental education programs that engage community members, researchers, and NGOs in biodiversity monitoring and sustainable practices​ (ref 1).

Airfield Estate, based in Dundrum, South County Dublin, is a dedicated sustainable food hub and Dublin’s only working urban farm and gardens. The 38-acre site, originally owned by the Overend family, attracts over 120,000 visitors for a fun day out including families, garden enthusiasts, schools, weddings and businesses.
The community garden at Airfield Estate is based on a partnership between the Estate and Toast corporation, a digital technology platform built for restaurants with an office in Dublin. The community garden was created to produce sustainable fruit and vegetables while also offering opportunities for people to learn about environmentally-friendly food production, empowering them to make more informed food choices. The Toast.org Community Garden at Airfield Estate will be a resource centre for education on nutrition, food sovereignty, seed saving, biodiversity, conservation, and resource management, supporting Toast.org’s mission to enrich the food experience for all. The community garden will also support Airfield Estate’s ambition to be Dublin’s sustainable food hub and help bring Dublin on its journey to be known as a world-leading sustainable food city (2, 3). The grounds will be accessible to everyone, from the local community and vulnerable groups to corporate employees, and the space will host horticulture talks and workshops on various topics. The partnership between Toast.org and Airfield Estate began in 2021 when some of Toast’s Dublin-based employees volunteered with the charity. The launch of the community garden is one of several ways Toast.org will support Airfield Estate throughout 2023. (2)

Tirana's urban development has set a new record in 2022, when more than 1.8 million square meters of new buildings were constructed (Ref. 5). This rapid development increased the need for accessible urban green areas. At the Tulla Urban Farm, a wide audience is trained to create those green areas in their yards, balconies and roofs with the added benefit of growing produce for their own needs (Ref. 1,2,5). This practice of food autonomy is deeply rooted in Albanian culture but has been lost in urban settings where concrete has taken over the city (Ref. 1). Tulla Urban Farm addresses this issue by providing an inclusive space for people of diverse backgrounds to come together and experience urban gardening first hand under the guidance of professionals from the Agricultural University of Tirana (Ref. 2,3). In these "urban agricultural schools", workshops, seminars and discussions are held to re-cultivate traditional agro-cultural practices and knowledge that will benefit the participants, many of which are from marginalised backgrounds (Ref. 1, 4). All these activities are facilitated through the rooftop greenhouse of the Tulla Cultural Center, which harbours over 300 plants (Ref.1). As such, Tulla Urban Farm not only provides a space for experiencing and learning about plants but also for social interaction and building a community that also addresses more serious issues such as mental health in a society that faces high rates of unemployment (Ref. 1).
The project had received inital funding from the German GIZ in 2022 and won the Cultures of Resistance Award through which it financed the first two years of its programme and enabled free participation at the urban agricultural school for all participants (Ref. 2,4).

In 2021-2022, the fenced grassy area beside the Ballyfermot Community Civic Centre was transformed into a welcoming 'people’s park'—an open green space for the community (2). Designed by Dublin City Council’s Parks, Biodiversity, and Landscape Services, the park reflects ideas from local residents gathered over eight months of on-site conversations and two community consultation events.
The new park features a winding perimeter path, earth mounds planted with a variety of trees and plants for seasonal color, and infrastructure to support small community gatherings. An open pergola and a designated market space for food, plant, and craft markets provide inviting spots for social events. Along the park’s edge, a movement trail with playable elements for exercise and play adds a dynamic feature to the space.
Furthermore, a Jackstraws See-Saw is ideal for older children to play in groups and learn about movement whilst also being a tremendous informal seating area for them to gather and chat. Trees cover the See-Saw, offering shade and shelter from the weather, making it a great social space all year round. A Rope Course provides a physical challenge for older children to climb and balance at height while exploring the area. Informal play opportunities are found throughout the park to, with trees, fallen logs, benches and planting that create sensory, imaginative and physical play experiences. (5-7)
Additionally, an edible garden is planned to be developed collaboratively with local residents over the next 2-3 years (4).

Thessaloniki, Greece's second-largest urban center, is a key hub for economic growth and outward trade in the Balkans. The city hosts the country’s second-largest export port, which plays a crucial role in connecting European trade routes with Asia and China. However, until 2014, Thessaloniki's waterfront was poorly maintained, largely inaccessible, and unattractive. Moreover, major flooding events, connected to extreme weather events, exposed significant deficiencies in the city's flood mitigation infrastructure, leading to damage to housing and critical services. (5, 10, 11)
To address these issues, the Municipality of Thessaloniki launched an International Architectural Competition for the redevelopment of the New Waterfront. From 2006 to 2014, Thessaloniki's waterfront underwent a significant regeneration aimed at benefiting the city's population of 1.1 million and stimulating the local economy. The revitalized waterfront now stretches 3 kilometers between land and sea, featuring 58,000 acres of green space an playgrounds.. In total, 2,353 new trees and 118,432 plants were added across an area of 238,800 m² (Refs 1, 3, 4).
The project also introduced walking routes, sports and recreational facilities, seating areas, and scenic viewing points. The waterfront now has a bicycle path along the entire walkway, and an arbour of 660 umbrella pine trees, serving as shade from the midday sun. Completed in 2014, the New Waterfront has already become a vibrant urban green space, enjoyed by both Thessaloniki's citizens and visitors alike (Ref 4).

In Phoenix, access to native, traditional foods prepared by Indigenous communities is scarce. This disconnection is rooted in the legacy of colonization and the forced assimilation of Indigenous peoples through practices such as mandatory residential schools. The Phoenix Indian School, which operated until 1990, is a stark reminder of these injustices, and deep-rooted systemic inequalities continue to persist today. In response, Indigenous food activists have worked tirelessly to promote traditional foodways and advocate for food sovereignty.
One such initiative is led by Native Health, an urban Indian health program that provides primary medical, dental, behavioral health, WIC, and wellness services in Phoenix. In 2019, Native Health launched a community-based garden initiative to reconnect urban Indigenous communities with their traditional life ways. The Native Health Traditional Garden was initially established on a 15-acre plot of vacant land, which sat atop the remnants of a notorious boarding school. However, when an investment firm purchased the land, the garden was displaced and forced to relocate. It downsized to less than an acre of space within a larger community garden project known as the "KeepPhoenixBeautiful Garden."
Despite these challenges, the Traditional Garden continues to thrive, drawing from Indigenous agricultural techniques such as Akimel O’odham canal irrigation, Zuni waffle beds, and Diné dry farming. The garden focuses on cultivating traditional, Indigenous, and desert-adapted plants, including corn, beans, squash, gourds, peppers, sunflowers, melons, and medicinal plants. In addition to growing these vital crops, the garden provides interactive learning opportunities for all ages, including workshops, youth clubs, pick-your-own events, and monthly community workdays.
The goal of the Traditional Garden project is to offer the urban Indigenous community opportunities for hands-on learning, and increased access to harvested produce. (1, 2)

Biotope City Wienerberg is located in the southern part of Vienna on a 5.4-hectare site that once housed a Coca-Cola factory. It lies at the edge of the Wienerberg recreational area, surrounded by business parks and tower blocks to the west and predominantly detached houses to the east (Ref. 1).
The project embodies the concept of an "urban biotope" (Ref. 2), grounded in the principle that nature's mechanisms of self-regeneration are essential for mitigating the challenges of urban living and climate change. By integrating urban and natural spaces, Biotope City fosters both human-nature connections and social interactions through activities like community gardening. The project’s centerpiece is its extensive green infrastructure, including trees and green roofs, which serve to cool the microclimate, purify the air, enhance water retention, and create carbon sinks while providing habitats for local wildlife. These green spaces aim to improve physical health through cooling effects on hot days and support mental well-being with their calming influence (Ref. 1; Ref. 2).
Biotope City encompasses:
Around 980 flats, including 400 subsidized flats and 200 SMART flats
A school, a kindergarten, and 2,000 square meters of children's and youth playgrounds
600 square meters of community gardens and 3,850 square meters of ground-floor gardens
250 trees, 8,900 square meters of meadows, and 13,600 square meters of green roofs
2,200 square meters of façade greening
The inner courtyards and roof areas are designed for gardening, while façades are greened, and balconies are equipped with integrated plant troughs. Even the spaces between buildings are climate-effective, featuring unsealed catchment and seepage areas to manage water sustainably (Ref. 1).
The project’s implementation took 18 years and involved collaboration among various stakeholders. The concept was initiated by the Biotope City Foundation and funded by eight different investors (Ref. 2).