Joint implementation (e.g. tree planting)

Chickasabogue Park, a 1,100-acre outdoor recreation facility and wildlife refuge in Eight Mile, Alabama, is the largest park in Mobile County (Ref 3). Since 2022, the park has undergone extensive renovations aimed at increasing public access to green spaces and shoreline recreational areas, particularly along Chickasabogue Creek, while offering a variety of outdoor activities in a natural setting and preserving local biodiversity (Ref. 3).
The improvements focus on enhancing the day-use area, including upgrades to the playground, a splash pad, basketball courts (adapted to heavy rains with water-permeable materials), and a ball field (Ref 1, Ref 2). Additionally, a new pavilion site and an events and interpretive centre are being developed (Ref 1, Ref 2). Sidewalks and family-friendly walking trails are being built, and improvements are also being made to the park's mountain bike trail and disc golf course (Ref 2), providing more opportunities for outdoor physical activities in nature. Other significant upgrades include the creation of a restroom and a new parking lot with permeable pavers to prevent flooding (Ref 2). Critical infrastructure work is underway, including the installation of underground utilities, water, sewer systems, and roadwork (Ref 2). Furthermore, a new Recreational Vehicles (RV) campground with 38 spaces is in the works (Ref 2).
These upgrades are part of a broader initiative aimed at ensuring the public can quickly access and enjoy natural resources (Ref 2). The renovation also emphasises the cultural heritage and historical significance of the park, with plans to use architecture, design, and artefacts to honour the different cultures that once lived in the area (Ref 2). The next phase includes seeking funding to renovate the beach area and construct a new boat ramp (Ref 1).

The Ballymun City Farm project began as a grassroots initiative when local residents envisioned turning an underutilized green space into a vibrant community resource. Though initially rejected by the City Council, the project’s supporters recognized its potential to contribute to Ballymun’s environmental, social, and economic regeneration. With a vision to create something unique for the area, the farm was designed to foster community engagement, environmental education, and local sustainability. Over time, it has grown into more than just a recreational space—it has become a symbol of community resilience, offering people of all backgrounds and abilities a place to connect, learn, and grow together (4).
Situated on 6.6 acres provided by Dublin City Council, the farm aims to strengthen community bonds, enhance civic involvement, and combat social exclusion and isolation. It serves as both an educational and recreational space, providing opportunities for people of all abilities and backgrounds to engage with environmental topics, organic food production, native breed conservation, and traditional crafts. It is envisioned that the farm will include a designated ornamental garden, consisting of shrubs, flowers, grasses and bulbs, which will become a focal point for community activities/gatherings. In addition, we plan to install raised vegetable beds, fruit bushes.
Through urban food production and community gardens—effective tools for educating schoolchildren and engaging youth—the farm addresses the gap between food production and consumption, helping to increase appreciation for local food. Investments in green infrastructure like Ballymun City Farm also support urban and regional development, including the creation of jobs. (1, 2)

Alexandria is a city with a special charm, known for its beaches and gardens that act as the lungs through which the city breathes, and are considered a haven for its people (1). Unfortunately, in the last ten years, there has been a decrease in green space due to urban expansion and the establishment of Commercial and profitable projects (1). To address the lack of green space in the city, The Governor of Alexandria has stressed the continued efforts to develop, beautify and plant the squares and turn them into attractive civilized facades, as part of Egypts 2030 vision which aims to move towards a greener city and reduce the effects of climate change. (2). To encourage redevelopment of public green spaces, The Governor launched the “Alexandria shines with its squares” competition in 2023, where the top three neighborhoods with the best redeveloped squares would receive a prize of up to EGP 50,000 [928.45 EUR] (6). The First Al Montazah neighborhood participated in the competition by redeveloping Sidi Bishr Mosque Square (2-5). The 700 meter square was completely upgraded with solar energy, a new irrigation system to conserve water, modifications to the sewer network, and planting the garden with plants that suit the environment (3). The greening activities included planting 400 sticks of various crops in the upgraded square (4).

The Therapy Forest project in Nolan, Detroit, initiated in 2022 and completed in 2024, represents a step forward in urban renewal and ecological restoration, led by Rescue MI Nature Now (RMNN) and local volunteers. RMNN, founded in 2019, aims to transform vacant lots in the Nolan neighborhood—an area heavily impacted by the mortgage lending crisis—into green spaces that combat urban decay. The Therapy Forest, a 2.25-acre site, is designed as an accessible, restorative environment inspired by the Japanese practice of “Shinrin-Yoku,” or forest bathing, which encourages individuals to engage with nature through all their senses.
This project not only enhances the aesthetic appeal of the neighborhood but also serves as a habitat for native plants and pollinators, such as goldenrod and honeybees. Through a participatory planning and design process, RMNN has actively involved community members, particularly youth, in the development and ongoing maintenance of the forest. The project includes flowering beds, perennial gardens, and other landscaping features aimed at creating a serene and therapeutic environment.
The Southeast Michigan Resilience Fund provided key financial support, recognizing the project's potential to transform neighborhood decay into a green space that serves both ecological and social purposes. The Therapy Forest is expected to become a communal asset, offering hands-on learning opportunities for local students while also providing a peaceful retreat for residents and visitors.
By converting over 2.25-acre of vacant land, RMNN’s Therapy Forest stands as a model for how urban areas can reclaim unused spaces, fostering resilience, community engagement, and environmental stewardship. This initiative not only revitalizes the Nolan neighborhood but also serves as a beacon of hope and renewal, demonstrating the impact of green spaces on urban communities.
(Ref.1-4)

The PARC Rain Garden project in Plymouth, Michigan, is an innovative initiative led by the Plymouth Arts and Recreation Complex (PARC) and Friends of the Rouge, aimed at addressing stormwater management and enhancing local environmental quality. Supported by a $400,000 grant from Michigan’s Department of Environment, Great Lakes, and Energy (EGLE) through its Nonpoint Source Program, this project will involve the construction of over 31,500 square feet of rain gardens located on the property of Plymouth Arts and Recreation Complex (PARC). These gardens are designed to filter up to 240,000 gallons of stormwater per rainfall event, preventing runoff from entering local waterways like the Tonquish Creek. The rain gardens will also mitigate flooding, reduce pollution, and create a more stable water flow in the Rouge River watershed, which is heavily impacted by urban development.
In addition to their environmental benefits, the rain gardens will provide aesthetic and ecological value to the PARC campus. The plantings, featuring native Michigan species, will create habitats for pollinators such as bees, butterflies, and birds, complementing the existing beehives on the PARC rooftop. The project aims to showcase the feasibility of integrating green infrastructure into routine construction, encouraging its adoption in other urban areas and residential spaces.
Ultimately, the PARC Rain Garden project will not only improve stormwater management but also serve as a model for sustainable urban development, enhancing the landscape while fostering environmental stewardship in the Plymouth community.
(Ref.1,2)

Chandler Park, a historic park in Detroit constructed in the 1800s, underwent multiple expansions from 1922 to 1950 to include amenities such as a pool (later converted into a water park), a golf course, and public green spaces. In 2013, an expert panel recommended constructing a 2.5-million-gallon marshland within the park to provide a unique recreational and educational feature and incorporate green infrastructure principles for improved stormwater management. Completed in December 2019, the Chandler Park marshland was a collaborative project between The Greening of Detroit and the Chandler Park Conservancy, designed to enhance Green Stormwater Infrastructure (GSI) across 200 acres.
The marshland manages 2.5 million gallons of stormwater, substantially reducing the load on Detroit’s combined sewer system and minimizing basement flooding during heavy rains. Engineered with rain gardens, bioswales, and a pump system circulating up to 4 feet of water, the marshland fosters a balanced ecosystem with higher oxygen levels, benefiting local flora and fauna.
With 4,500 native plants, the marshland supports diverse wildlife, including migrating birds, turtles, frogs, pollinators like bees and butterflies, and natural mosquito predators. This project not only contributes to flood mitigation but also improves water quality by capturing stormwater and allowing pollutants to settle.
Additionally, the marshland provides a foundation for future environmental education, with plans to add an outdoor classroom and public learning spaces. The use of native plants ensures low maintenance and sustainability, requiring minimal water and fertilizers. By creating new habitats and recreational areas, the Chandler Park Marshland promotes biodiversity, environmental education, and community engagement, while alleviating urban runoff’s impact on Detroit’s sewer system.
(Ref.1-3)

Ngong is a town in southern Kenya, located near Nairobi in Kajiado County, on the slopes of the Ngong Hills. The municipality has experienced significant development and population growth due to improved infrastructure and social amenities. However, this expansion poses a threat to biodiversity, as increased demand for agricultural land, wood, and raw materials is depleting the area's forests and putting many species at risk of extinction. Overgrazing, illegal logging, invasive species, and climate change-induced extremes like droughts and floods have further exacerbated the situation.

In response, the Rufford Foundation proposed the Improving Ngong Hills Forest Conservation Efforts through Raising Local Community Awareness of Biodiversity Conservation project. The initiative seeks to restore the Ngong Hills forest ecosystem through community-driven conservation. A nursery for native species was established, and tree planting campaigns were conducted in collaboration with national and local governments, community-based organizations, indigenous groups, and schools. Additionally, awareness programs and capacity-building efforts were launched, engaging local schools in restoration activities and organizing workshops to train community members and officials. (Ref. 1, 2, 3, 4, 5)

To protect the Lomas de Primavera from urban pressure and other threats, the Lomas de Primavera Ecological Association has implemented strategies for its conservation. One of the strategies this organisation has promoted is reforestation activities. Working together with the Municipality of Lima and other interested actors, they have sought to expand Lima's green spaces, improve air quality, enhance flora, and promote tourism, among other benefits (1). Lima's Municipality has supported the project by donating 20,000 trees for reforestation and to prevent land encroachment (1), social organisations and environmental activists have joint efforts to plant more than 250 trees to support the conservation efforts (2, 7).
The Lomas de Primavera Ecological Association leads the project, organizing community management efforts to conserve the Lomas de Primavera sector. This association is based in the Agrupación Familiar Primavera Lomas de Carabayllo community (2). The association's conservation activities involve collaboration with various stakeholders at different levels. Locally, it works with community leaders and organizations. At the district level, it coordinates with the Carabayllo municipality and the NGO CIDAP to improve urban conditions. The metropolitan-level collaboration includes the Municipality of Lima and the ACR 'Sistema de Lomas de Lima' for ecosystem protection and valorization. Nationally, it partners with MINAM, SERNANP, MINAGRI, UNDP, UCV, and the Network of Peruvian Lomas to enhance ecosystem services, restore degraded areas, and conduct research on the Lomas (2).
The preservation and reforestation of these ecosystems is essential, as they have social, cultural and environmental value, including the following ecosystem services: provision of genetic resources, soil formation, pollination, aesthetic services, ecotourism, food, education, and archaeological and historical services (3)

In 2020, the European Fund for the Balkans (EFB) launched the Trees of Friendship project, which plants over 400 trees annually across six Western Balkan capitals, known to be some of the most air-polluted cities in Europe (Ref. 5). Tirana has been involved from the start, having planted over 110 trees in locations such as Great Lake Park in 2020 and Farka Park in 2022 (Ref. 1,2).
The project is carried out with the support of local municipal and civil society partners, including Tirana's Parks and Recreation Agency and the Environmental Territorial Management Institute, along with activists and volunteers (Ref. 1,2). The initiative was planned in 2019 when the EFB board decided to mitigate its CO2 emissions from business-related flights and enhance local and regional cooperation on air pollution (Ref. 3,4,5). Despite challenges in citizen engagement during the COVID-19 pandemic, the Trees of Friendship project continues to raise awareness about the role of trees in mitigating the impact of air pollution on health and well-being (Ref. 2). Its strong and well-established local and regional partnerships have facilitated the project's implementation in the past and continue to benefit in scaling the project (Ref. 1,5).

The Establecimiento Público Ambiental (EPA) Cartagena has led multiple tree-planting initiatives in the Mamonal Sector as part of its ongoing efforts to promote environmental sustainability in Cartagena. The main goals of this initiative are to recover and enhance urban green spaces by planting trees, improve air quality and build a strong environmental culture within the community. In April 2024, EPA Cartagena led a tree-planting and public space recovery initiative in Nuevo Oriente, in collaboration with local authorities, community representatives, and the private sector, such as Veolia, as part of its ongoing efforts to strengthen environmental education and promote urban sustainability (ref 1). In a related tree-planting campaign, 210 new trees in Mamonal and Membrillal to help mitigate climate change, reduce air pollution, and protect local biodiversity. The effort received support from local industries such as Etex and AM SAS Mamonal. This campaign also aimed to enhance the natural environment in industrial areas and to encourage other companies and community members to join in environmental restoration efforts (ref 3).