Urban or built environment

The Growroom is a spherical urban garden made of plywood, designed as a temporary installation in Gdańsk’s Strzyża district. Originally created by Danish architects Sine Lindholm and Mads-Ulrik Husum, the structure was adapted for this location as part of a collaborative initiative. It provides a small, functional space where residents can plant and enjoy greenery within the city.
In Gdańsk, the Growroom was used to cultivate flowers, herbs, and strawberries, with the plant selection curated by Joanna Paniec, a specialist in the city’s green initiatives. A central bench within the structure offers a simple resting spot for visitors. While visually appealing, the installation primarily served as a short-term experiment in integrating greenery into urban settings.
The project was co-financed by the Danish Cultural Institute, the Danish Ministry of Culture, the Danish Ministry of Foreign Affairs, and the Environmental Department of the Gdańsk City Office. It was brought to Gdańsk by the Polish foundation Kultura nad Kulturą and conceptualized by Agnieszka Wołodźko, a painter, exhibition curator, and author of the blog Pomiędzy sztuką a życiem. The installation was in place from [add dates if available], after which maintenance was handed over to the local community.
The Growroom was not intended as a long-term urban feature but rather as a temporary initiative to explore the role of small-scale green spaces in cities. While it provided a brief opportunity for local engagement with urban gardening, it was ultimately a short-lived addition to the district. (1-4)

On the site of a former malthouse in Berlin, a company has developed a sustainable rainwater storage system to prevent flooding in the sealed environment, which had been vacant for several years. Once used for malt production, the site is now home to offices, studios, manufacturing businesses, and hosts sustainable events. The site's transformation includes natural gardens, tenant gardening beds, green roofs, and two outdoor water basins that retain rainwater, creating a blue space for recreation. (Ref. 1)
The two ponds are filled with filtered rainwater, and an underground tank stores additional water, allowing it to seep away gradually. Native plants surround the ponds, creating a habitat for local wildlife. Given that much of the surrounding area is sealed, the ponds help mitigate urban flooding by managing and storing rainwater, reducing the site's reliance on the urban sewage system. Additionally, as Berlin faces extreme heat in summer, the project offers a cooling effect and provides access to filtered water during droughts. (Ref. 1; Ref. 2)
The project is managed and financed by IGG Malzfabrik mbH, which oversees the entire site in Berlin's industrial area and rents out office spaces to various companies. This initiative is part of a broader sustainability strategy that addresses social, economic, and ecological factors, and it is featured in the company’s common good economy report (Gemeinwohl-Ökonomie Bericht). (Ref. 5)

Bring Nature Home project, partly financed by and implemented under the New European Bauhaus programme by the organisation "UrbanizeHub", is an initiative focused on encouraging and helping the city of Iasi to become more green while strengthening urban communities (1 & 3). More concretely the project sought to transform an unused space in a residential area of a neighborhood in Iasi through a "biophilic design", with the involvement of the local community (1 - 5). The space was then transformed into a green area that would help the residents reconnect with nature (1 & 4). The implementation later helped develop a handbook that could be used to reproduce the methods of the initiative in other urban settings (4 & 5).
Involving the local community, including children from the nearby daycare, the project conducted five workshops. These workshops focused on educational activities, improving the connection with urban nature, and ultimately creating an urban garden which included perennial plants, and insect and bird houses (5, pp. 53 to 58).
Beyond community engagement and inter-generational dialogue, the project highlighted the importance of natural elements and biodiversity in urban settings. It also facilitated knowledge exchange among public institutions, NGOs, and private companies. With additional funding from IULIUS and municipal approval, the initiative successfully transformed the unused space into a thriving green area (4 & 5, p. 67 & 71).

The project for Tricentennial Park involves a series of improvements aimed at enhancing its overall infrastructure and appeal. Among the planned upgrades is an enhancement of the pavilion, along with the addition of other site amenities (Ref 1). A lake is also being created as part of the project (Ref 2). Currently, work is underway on phase two, which includes landscaping, the construction of a group picnic pavilion, walking trails, a parking area, and even a misting machine to provide relief during hot weather (Ref 2).
One of the key highlights of the project is the opening of a new playground in 2024, featuring a unique design. The park is laid out in a figure-eight pattern, and a sign within the park highlights its recognition for following “best practices in youth fitness,” encouraging children to stay active through sliding, swinging, spinning, climbing, brachiating, and balancing (Ref 2). This park is the first in Mobile designed exclusively for passive use, without ball fields, providing a space for families and individuals to enjoy the playgrounds (Ref 4). The park fosters social interaction, allowing children to build friendships and create lasting memories while spending time with their families (Ref 4). The park also boasts beautiful scenery, adding an aesthetic dimension to the overall experience (Ref 2).
Tricentennial Park is part of the larger Three Mile Green Trail, a 6.5-mile linear park. A one-mile segment of the trail is located within Tricentennial Park. The trail will be expanded east to MLK Boulevard and west to Bush Park by 2024 (Ref 1).

The Torre Sevilla is a commercial building complex with extensive green roofs. The green roofs cover 11000 or 12000 m2 (different sources report different numbers) and aim to contribute to thermal isolation and energy efficiency of the building, improve air quality and provide an urban green space for relaxation and recreation [Ref. 1-3]. The green roofs include a mosaic of different vegetation types and about 60 mostly native plant species. There is a rainwater recovery system that allows the gardens to be irrigated in a sustainable way [Ref. 1-3, 6]. The building finished construction in 2017 and the gardens were initially not available to the public. In 2023, the owner applied for a permit to host events in the gardens, which will allow the public to visit on occasion [Ref. 1, 3-5].

In Phoenix, over half a million people are facing hunger, including schoolchildren, working parents, seniors on fixed incomes, and other marginalized groups. Factors such as limited food access and poor food quality—commonly referred to as 'food deserts'—worsen the problem. Food deserts are areas where residents have little to no access to fresh, healthy, and affordable food. Of the 55 food deserts in Maricopa County, 43 are located in Phoenix, affecting nearly half of the city's population
Agave Environmental Contracting, an NGO, is working to address food scarcity through education. The organization founded the Urban Farming Education (UFE) program to teach people how to grow their own food as a solution to food insecurity and to promote agricultural opportunities throughout the Valley. The goal of UFE is to educate individuals on creating their own gardens for sustenance, ecotherapy, social impact, and even urban farming for profit.
The program specifically targets schools, domestic violence shelters, homeless shelters, foster care prevention centers, and communities with disabled or elderly residents. In 2024, UFE partnered with the Valencia Newcomer School to install raised garden beds filled with roses and fruit trees. This project provided hands-on STEM learning during the installation, fostered networking opportunities through industry experts and community members, and helped promote the UFE program. It also highlighted how the initiative contributes to urban farming education and empowers local communities. (1-5, 7)

The Prinzessinnengarten Kollektiv Berlin is a community garden in the New St Jacobi Cemetery in Berlin-Neukölln that invites people to join in gardening and experience nature. As part of open gardening days, people can participate in the design of the garden areas and gain experience in the local, ecological cultivation of useful plants. The main aim of their work is to provide opportunities for education and participation. Activities are open to everyone and range from sowing, planting and harvesting to seed production, processing and preserving vegetables, keeping bees to questions of community-based urban habitat design.The community also has its own farm shop where seeds, food and processed products are sold. (Ref. 1; Ref. 4) Numerous projects for recycling and upcycling, innovative cultivation methods, organic beekeeping, composting methods and post-fossil mobility use the Prinzessinnengarten as a platform for sustainable urban living. Artists also work in the garden with participatory methods on the question of how cities and their coexistence can be designed in a sustainable and resource-saving way. Outside the Prinzessinnengarten, offshoot gardens are set up and collaborations are developed to build nationwide and European networks. Through lectures, workshops, study visits and participatory research in the garden, we endeavour to include and further develop the topics associated with the Prinzessinnengarten in discussions and education. (Ref. 7)

The project is located on a cemetery, which has been partially closed since 2016. This means that burials are no longer carried out on the site and the existing rights of use of the 500 or so remaining graves will no longer be extended after expiry. The church association lends the land to the project in exchange for maintenance work on the surrounding grounds. (Ref. 6)

The revitalization and environmental recovery initiative in the Almirante Colón neighborhood of Cartagena focused on transforming green spaces and addressing environmental hazards posed by improper waste disposal and urban degradation. The primary goals of the project were to enhance urban green spaces, improve community well-being, and mitigate environmental hazards such as pollution and improper waste management (ref 1,2). The initiative involved multiple stakeholders, including the local government, community leaders, and private sector actors. The Gerencia de Espacio Público y Movilidad led the revitalization of three parks, focusing on cleaning up waste, maintaining green areas, and upgrading recreational facilities. Parallelly, Veolia, a private sector partner, worked with community leaders to recover neglected areas that were previously used for dumping mixed waste and beutify the environment. These efforts included planting activities, installation of solar lamps, and community education on proper waste disposal practices​ (ref 1,2). The revitalization of the parks benefited over 400 families, providing them with safe and clean recreational spaces. The project also successfully eliminated a significant dumping site, reducing pollution and enhancing the neighborhood's aesthetic appeal. Moreover, the initiative fostered a stronger sense of community ownership and responsibility towards maintaining the improved environment​ (ref 1,2).

The Ringsend Open-Air Laboratory project in Dublin, Ireland, is part of a broader effort to adapt urban areas to increasing climate change risks. This initiative focuses on installing green roofs and deploying a network of environmental sensors to enhance urban resilience. Launched in 2018 under the Horizon 2020 OPERANDUM project, the effort seeks to find nature-based solutions for climate change impacts worldwide. Led by the University of Bologna, OPERANDUM involves over 20 partners, primarily in Europe, working together to address environmental challenges like flooding, drought, and coastal erosion through the establishment of ten "Open Air Laboratories" globally.
In Dublin, the project aims to bolster flood resilience in Ringsend, a critical economic area near the city’s tech district, which faces substantial flood risks due to its low elevation and proximity to the Dodder River. This river, which flows through both rural and urban areas before meeting the River Liffey near Ringsend, has caused property and infrastructure damage from extreme rainfall and combined river and tidal flooding.
Green roofs play a key role in mitigating urban flood risks in this project. These rooftop gardens absorb large volumes of rainfall before it reaches the streets, easing the load on existing flood prevention systems like storm drains and gullies and reducing the need for additional "grey" infrastructure. Based on community insights and recommendations, construction has begun on a green roof on top of the CHQ building in Dublin’s Docklands, in partnership with Dogpatch Labs.Complementing this, over 100 sensors have been deployed in recent research trials across Dublin. OPERANDUM researchers are now building on this foundation to create a denser, more reliable, and cost-effective sensor network, with data from earlier low-cost sensor trials made publicly accessible via Dublinked, Dublin’s open data platform, and exploring the use of LPWAN for environmental sensing. (1-5, 7)

Torslanda School is a newly built elementary school (years 0-6) where the schoolyard includes innovative ways to manage rainwater. The school was initially part of the Rain Gothenburg project, which aims to make the city, and this school, the best in the world when it rains. It was also a pilot project within the city's "equal building" initiative, aiming to make indoor and outdoor environments accessible and attractive to everyone regardless of gender identity, functional diversity or age [Ref. 1]. The main element of the schoolyard is a "river" to which water will be led when it rains, combining stormwater management with opportunities for play and education. The system will retain about 310 m3 of water and treat it before releasing it to a recipient. The river will be used to teach the children about climate, ecology, biodiversity and the water cycle. The river and schoolyard are connected to a natural wetland [Ref. 3, 4]. The school is run by the City of Gothenburg, who initiated the project, employing an architecture firm and a construction company to design and build the school and schoolyard [Ref. 3-5].