Urban or built environment

In 2015, The Greening of Detroit and the Joy-Southfield Community Development Corporation collaboratively installed a bioswale in Stein Park, Detroit, as part of a broader effort to mitigate flooding in the Cody Rouge neighborhood. The area, particularly affected by heavy rains and flooding due to its proximity to the Rouge River, suffered significantly during the 2014 Great Flood, highlighting the need for improved stormwater management. The bioswale, a Green Stormwater Infrastructure (GSI) feature, was designed to capture and infiltrate up to 6,000 gallons of stormwater, diverting it from the city’s aging combined sewer system. By reducing the risk of sewer overflows, this installation also decreases the flow of untreated water into local waterways.

Funded by an $83,000 Kresge Foundation grant, the bioswale incorporates a mixture of native plants, prairie wildflowers, and ornamental grasses to filter sediment and pollutants. In addition to stormwater management, the project aims to enhance community engagement and economic revitalization. Students from Cody DIT High School's Green Team participated in the planting and design process, learning valuable skills in landscape architecture and green infrastructure. The project also ties into the Joy-Southfield CDC's vision of establishing a "green zone" to promote community safety, economic growth, and environmental stewardship.

Future plans include further green infrastructure development, such as additional bioswales and a parking lot with pervious pavers, contributing to Cody Rouge’s transformation into a model neighborhood for green development. This project not only addresses urgent environmental concerns but also fosters community pride, safety, and economic opportunities, positioning the neighborhood as a leader in Detroit’s green infrastructure movement.
(Ref.1-4)

In 2001, the local municipality of La Paz, in collaboration with the International Union of Architects (UIA), launched a design contest to create a central park within a protected natural area (3). The park's aim was to develop urban infrastructure while connecting nature with the city (3). The winning architectural design envisioned an infrastructure that would harmonize with the existing natural surroundings and minimize interference with the environment (4).
The park's implementation included pedestrian and bike pathways, numerous panoramic viewpoints, facilities for exercise and cultural events, buildings dedicated to science, historically significant monuments, playgrounds, and the rehabilitation and creation of multiple green spaces (1 & 4 to 6).
While most of the project was completed by 2009, the area's exposure to recurrent landslides, droughts, and illegal waste disposal, combined with ongoing degradation, has necessitated afforestation efforts and maintenance actions from the municipality to ensure the protection of the natural area and enhance its benefits (7 & 8). Recently, the park has been part of a national citizen monitoring program for species, which has improved the categorization of wildlife in the area (11 & 12). Additionally, 2,000 trees were planted in the park in 2023 as part of a reforestation campaign, and cleaning and watering maintenance work has been carried out to support their growth (7 & 13). This initiative is part of a larger project to revitalize the park (10 & 13).
Overall, the park aims to protect local wildlife and plant species while acting as a "green lung" for the city, regulating the climate, providing recreational spaces, and improving livability (14).

The Park am Gleisdreieck is a public urban park in the city centre of Berlin, spanning more than 30 hectares across three individual sites (Ostpark, Westpark, Flaschenhalspark) on former railway tracks. The landscape of the Park am Gleisdreieck is characterised by the central, extensive lawn and meadow areas, which are bordered by woodland-like areas - the so-called track wilderness - as well as various park trees and crossed by wide paths or old railway tracks. The park space features various recreational activities for sports and play as well as community gardens for intercultural exchange (Ref. 12). Being abandoned after WW II, the land rewilded and after being partially opened to the public in 2011, the primary aim of the maintenance and development measures was to harmonise the interests of nature conservation and recreational use. (Ref. 1; Ref. 3)
Many of the plant species in the Park am Gleisdreieck once travelled a long way by train. This is what makes the biodiversity in the park so special. It is a wild mixture of long-established Berlin plants and exotic species that specialise in dry, nutrient-poor soils. The park is part of Berlin's open space network, which extends from Tiergarten to Schöneberger Südgelände. It therefore makes a significant contribution to connecting habitats. (Ref. 1)
Initiatives of citizens have been working for years for the realisation of a park on the former railroad site at Gleisdreick, and so the residents have been involved in the park planning and design in an intensive dialogue process from the beginning and are still involved in the park management. (Ref. 2) The opening of the park served as a compensation measure for the construction of the urban development projects at Potsdamer Platz and aimed at increasing accessible green space in a densely and rapidly built urban environment. (Ref. 4)

Ballymun is a suburban area on the north side of Dublin, Ireland. Originally developed in the 1960s, Ballymun was built to address Dublin’s post-war housing shortages, with iconic high-rise towers and flat complexes. However, over the years, the area faced social and economic challenges, leading to a reputation for issues such as poverty, unemployment, and lack of services.
In response, the Irish government launched the Ballymun Regeneration Project in the late 1990s. As part of the Ballymun Regeneration, Poppintree Park has been transformed into a 45-acre public space at the heart of Ireland’s celebrated urban renewal project in Ballymun Town Centre. This redevelopment followed an extensive public consultation process, incorporating input from local residents, sports clubs, community groups, and youth organizations.
Poppintree Park now offers a range of upgraded amenities, including a Tree Trail featuring 15 native tree species, enhanced biodiversity, extensive wetlands, sustainable drainage systems, and spaces for passive and active recreation. The park also features a 1.25-acre playground for children aged 0-12, an amphitheater with a permanent pond, and a fully accessible pathway network with abundant seating and viewing areas. Over 50,000 plants have been added to enhance the park’s natural beauty.
The park’s transformation, led by Ballymun Regeneration Ltd., involved significant engineering and landscaping efforts. Mitchell + Associates provided the detailed landscape design, construction drawings, and supervised the landscape works.
Completed in 2010, Phase 1 of Poppintree Park’s redevelopment represents an investment exceeding €6 million. The project includes substantial earthworks, drainage systems, gabion walls, three limestone-paved entrance plazas, structural retaining walls, a cantilevered pond walkway, diverse path surfaces, and high-quality playground construction. (1-7, 10)

The Loma del Marión recovery project in Cartagena, Colombia, is a community-driven initiative supported by EPA Cartagena that focuses on restoring and conserving the remaining 1.2 hectares of tropical dry forest. Initially covering 33 hectares, the area has suffered degradation due to illegal encroachments, deforestation, and waste burning. The project has included planting over 3,000 plants and fostering community involvement in environmental conservation (ref 1). The main goals are to restore the ecosystem by reforesting native species, preventing landslide risks, and developing an ecopark that will serve as an educational and recreational space. Planned facilities include a library for learning about local flora and fauna, hiking trails, and a community garden to enhance local food security (ref 1,4). A notable educational initiative in the project is the formation of "Vigías del Ambiente" (Environmental Watchers), a group of 40 youths from the Red Nacional Jóvenes de Ambiente, supported by EPA Cartagena and CDKN. This initiative educates young people on climate change, conservation, and waste management through workshops and activities (ref 2, 3). In addition, the EPA is leading detailed studies of the tropical dry forest to identify and protect endemic species (ref 5). The project has resulted in significant environmental and social benefits, such as planting thousands of trees, boosting community engagement in conservation, and establishing youth groups dedicated to sustainable development and climate action (ref 3, 5).

Kungsgärdet Byaodling is an urban farm set up by local farming association Kungsbacka Tillsammansodling, in Kungsbacka south of Gothenburg. Since 2023, the project has been funded by a 78 000 EUR grant via the non-profit organisation Lokalt ledd utveckling Halland (locally led development) using funds from the EU and the Swedish Board of Agriculture (Jordbruksverket) [Ref. 1, 2, 4]. The goal is to grow food in a sustainable and circular way, building soil health and promoting biodiversity. Using a total area of 4500 m2 on former unused grassland, the urban farm includes: 1100 m2 of effective growing area, 1000 m2 of flowering meadows, fruit and berry trees and bushes, and functional and social areas. The meadows and trees are intended to contribute to biodiversity, while social areas are meant to create a sense of community and benefit the well-being of the people active at the farm [Ref. 1, 3]. The farming association has been around for a few years, but the project funds will allow them to expand and develop the farm over three years, invest in new equipment and arrange free lectures for the public about sustainable farming practices [Ref. 1, 4]. The grant will also allow them to take in more members without anyone having to pay anything, promoting social inclusion.

In Egypt, knowledge about climate change remains limited, particularly among the younger generation. While all children globally face the challenges of a degrading natural environment and climate change, some are more vulnerable than others. This vulnerability is often influenced by the quality, availability, equity, and sustainability of essential services such as water, sanitation, healthcare, nutrition, and education. In response to these concerns, Egypt has taken steps to empower its youth to engage meaningfully in international efforts to combat climate change.
In 2022, with the support of UNICEF, the United Nations in Egypt, USAID, and the Embassy of Switzerland, Egypt's Ministry of Youth and Sports and Ministry of Environment launched the EGYouth4Climate Caravan. This initiative aims to raise awareness among children and young people about climate issues, encourage climate action, and provide a platform for youth to share their opinions and ideas. The caravan hosts a range of activities, including capacity-building sessions, youth dialogues, competitions, festivals, theatrical performances, bootcamps, and awareness campaigns.
One of the caravan’s stops was at the Nasr Youth Center in Alexandria, where a seed-planting workshop was held as part of the caravan’s reforestation activities. This workshop offered children a hands-on learning experience, teaching them about the importance of trees and providing an opportunity to plant seeds and trees across the center’s grounds. Through such initiatives, the EGYouth4Climate Caravan fosters climate literacy and environmental stewardship among Egypt’s youth, empowering them to take active roles in shaping a sustainable future. (1, 2)

In an architecturally important area of Berlin, situated between the Landwehr Canal, the Kulturforum (the Berliner Philharmonie and the Berlin State Library) and the new construction on Potsdamer Platz, a combination of green and grey infrastructure has been realised to minimise the burden on Berlin’s existing water infrastructure.
Green and non-green roofs harvest annual rain, which flows through the site’s buildings and is used for toilet flushing, irrigation, and fire systems. The roofs retain and then release water to the large on-site buffer pond, which has five underground storage tanks. Next to the roofs, a series of urban ponds and connecting canals have been implemented, with a combined area of approximately 1.2 hectares. They are filled with rainwater, creating an oasis for urban life. Vegetated biotopes are integrated into the overland landscape and serve to filter and circulate the water that runs along streets and walkways. The lake’s water quality is excellent, forming a natural habitat for animals and cooling the surroundings, while fresh water usage in the buildings has been reduced. (Ref. 1; Ref. 2; Ref. 3; Ref. 6)
The project was implemented in the 1990s as part of the development of Potsdamer Platz in the wake of the reunification of Germany. Several architects collaborated on the implementation that was completely privately funded. Beyond its ecological and technical features, the site is a blue natural site in the heavily built city centre of Berlin and allows people to linger and enjoy natural features. The drainage system won several sustainability prices and is considered a successful integration of nature and technology-based mechanisms to foster climate change adaptation. As the rainwater system stores rainwater in underground tanks and ponds, the urban sewage system is relieved during heavy rain, and water can evaporate. Therefore, the small water circle is closed, and the microclimate is cooled. (Ref. 2; Ref. 6)

The Green and Blue Axis (Eixo Verde e Azul, EVA) is an inter-municipal green corridor project connecting the municipalities of Sintra, Oeiras, and Amadora through a 15-kilometre green ecological axis along the Jamor River (Ref 2). It aims to renaturalize the river, improve water quality, and control flooding while promoting sustainable mobility through pedestrian and cycling routes (Ref 5). The project also enhances public access to green spaces and cultural heritage sites, such as the Queluz National Palace (Ref 6). EVA supports the Lisbon Metropolitan Area’s regional strategy for climate change adaptation, risk prevention, and low-carbon economy (Ref 4). Funded by the European Regional Development Fund and municipal budgets, the project has an overall investment of €11 million (Ref 1). EVA exemplifies inter-municipal cooperation, overcoming policy conflicts to achieve shared environmental, social, and economic goals, making it a model for integrated territorial development (Ref 4). The project’s long-term impact includes reduced carbon footprint and increased territorial cohesion.

Located in the Lima district of San Isidro - the heart of commercial activity in Peru - the Real Dos Tower is a prime office building in the Centro Empresarial Real de San Isidro. It was inaugurated in 2018, and it is distributed over 23 levels (14 floors and 9 basements) and enjoys a landscaped green roof (1162 m2) at the crown of the building and numerous outdoor vertical gardens at full height (2365 m2) on the three main fronts (1, 4). This project was a finalist in the 2018 Mipim Awards, considered the ‘Oscars’ of world architecture, and stood out for its architecture and design, due to its attributes of innovation and sustainability (2).
This building has managed to create harmony between design and efficient use of resources. It is characterised by a glass façade with colourful movable shutters and symbolic Peruvian designs (2, 3, 6). It has green walls on the three main fronts, four daylight fronts and a roof garden (2). The architect, Jean Nouvel, worked together with ARVE Peru on the overall landscape plans for the Real Dos tower (1, 3).
This is part of the façade remodelling project of the Camino Real Towers in the Real Business Centre, led by the real estate company Grupo Centenario (1, 2, 3, 4, 5, 6). This overarching Project has sought to develop 4,475 m2 of vertical gardens and roof gardens, which have a technified irrigation system to generate efficiencies in water use, meeting the plants' water requirements in the different seasons of the year. Their implementation helps to filter CO2 and renew the O2 in the office complex.
The ARVE group describes these actions as conducive to creating thermal barriers and sound insulation, a better environment for rest, work and entertainment and increasing property value (7)