Green Lima
Lima Verde is one of the pillars of the metropolitan mayor's government plan and is supported by SERPAR. It aims to reforest hillsides, hills, and central berms of metropolitan and local roads, as well as public recreational spaces, to create urban lungs that generate oxygen and scenic beauty for the benefit of the health of all residents (Ref 1, 3). Its goal is to plant one million trees in four years (2022 - 2026) in different parts of North, East and South Lima (Ref 3, 5, 6). This project is being carried out to respond to the increasing problem of urban heat islands that are being generated, especially in the most vulnerable districts where there is no shade due to a shortage of trees (Ref 1, 4). It is therefore focused on areas where the environmental quality is low, where the pollution is high and where there is more danger of higher temperatures (Ref 1, 7).
This programme aims to include youth volunteers, district municipalities, educational institutions, grassroots social organisations, neighbourhood leaders, residents and other entities that favour environmental conservation (Ref 1, 2, 3, 5).
This programme aims to include youth volunteers, district municipalities, educational institutions, grassroots social organisations, neighbourhood leaders, residents and other entities that favour environmental conservation (Ref 1, 2, 3, 5).
Cerro de la Popa recovery Project
Reforestation project for the "Cerro de la Popa", which is Cartagena's highest point and one of the main tourist attractions because of the view and its colonial convent (Ref 6). The hill currently faces illegal occupation and environmental deterioration caused by deforestation, poor solid waste management, burning, logging, and the loss of vegetation cover (Ref 4, 5). The intervention in La Popa consists of reforestation activities, environmental education activities with children, and awareness-raising activities with adults about caring for fauna, flora, and water bodies (ref 2, 3). SSince 2020, the Establecimiento Público Ambiental (EPA Cartagena) has led the recovery initiative, prompted by the urgent need to counter the increasing encroachment by migrants and vulnerable populations (Ref 4). The project comprises reforestation efforts, environmental education sessions with children, and community outreach to raise awareness among adults regarding the protection of local fauna, flora, and water bodies (Refs 2, 3). As part of a broader municipal agenda, the initiative remains active, with the most recent intervention conducted on July 11, 2024 (Ref 2).
Tbilisi Urban Forest (Narikala Ridge Forest)
The Tbilisi Urban Forest is an ecological restoration project of 5,5 ha spanning two pilot areas initiated in 2020. Located on Mtatsminda ridge around Tbilisi, it is part of a larger reforestation effort within the 700-ha forest territory (Ref. 1,2). The project is funded by the Cartu Foundation and led by the Development and Environment Foundation along with Tbilisi City Hall. Restoration is undertaken to addresses significant challenges such as forest dieback caused by pest infestations, climate change adaptation as well as the creation of recreational infrastructure (Ref. 3,5). Through collaboration among interdisciplinary scientists and urban planners, a novel reforestation strategy has been developed that integrates patches of locally sourced plant communities tailored to diverse soil and slope conditions. This approach incorporates existing trees with new saplings, carefully grafted into existing soil pockets, and focuses on a biodiverse palette of endemic and climate-adapted species (Ref. 1,5). While the project implementation could not be carried out as planned, lacking public participartory due to Covid 19, still 100 jobs were created locally (Ref. 2). Ultimately, the Urban Forest project will enhance ecological connectivity, biodiversity and tourism and also serve the public as an improtant recreational site (Ref. 1,2).
Monsanto Forest Park's Management Plan
The Monsanto Forest Park Management Plan focuses on enhancing the Monsanto Forest Park as an urban ecosystem, thereby improving ecological health and biodiversity while promoting sustainable resource use and integration with urban areas. Key interventions include managing invasive species, preventing forest fires, and supporting native habitats. The plan also aims to improve recreational and educational facilities, reduce automobile traffic, and enhance public accessibility. It aims to cover conservation efforts, recreational use and urban integration as well as promoting the park as a model for sustainable urban forestry. The implementation is overseen by the Lisbon City Council. (Ref 1,4).
In 2021, this historic urban forest received the Forest Management Recertification under the Forest Stewardship Council®, "the most important global certification in terms of environmental compliance of forestry operations (Ref. 6).
In 2021, this historic urban forest received the Forest Management Recertification under the Forest Stewardship Council®, "the most important global certification in terms of environmental compliance of forestry operations (Ref. 6).
We plant good deeds in Romania
The afforestation project implemented in Lețcani, Iași, is part of Romania's national initiative "We Plant Good Deeds" (Refs. 1-7). Launched by the association EcoAssist and carried out on a voluntary basis, the initiative aims to plant forests across the country (Ref. 8). In Lețcani, the young ecologist group TERIS, together with EcoAssist, involved volunteers to plant approximately 10,000 tree saplings provided by the Forestry Directorate of Iași (Refs. 1, 3, 5-7). The trees were planted on a two-hectare terrain prone to landslides, with the goal of mitigating this hazard (Refs. 1, 3, 5-6). While the project directly benefits local citizens at risk of landslides, it also educated volunteers about the importance of forest cover for community safety and biodiversity (Ref. 4).
A wood for the city: the urban forest of Mount Urpinu
In the city of Cagliari, in the location of Mount Urpinu, 6400 new trees have been planted. The project, initiated in 2022, sought to restore the area's biodiversity and to revitalize the park for the benefits of the citizens (Refs. 1, 3 & 8). In fact, in previous years, the park has been subject to various environmental and social hazards because of its conditions: the area has been subject to wildfires and abandoned wastes, and with time, it became a gathering point for drug addicts and homeless people, thus becoming unsafe for citizens and especially for children (Refs. 1 & 6).
Therefore, the Metropolitan City of Cagliari decided to reclaim the area and plant thousands of trees of various species (holm oaks, oaks, pine, carob and olive trees) over more than 6 hectares of land (Refs. 3 & 8). The project's goal is to restore biodiversity, mitigate temperatures, decrease air pollution, and increase citizens' sense of community (Ref. 1).
Therefore, the Metropolitan City of Cagliari decided to reclaim the area and plant thousands of trees of various species (holm oaks, oaks, pine, carob and olive trees) over more than 6 hectares of land (Refs. 3 & 8). The project's goal is to restore biodiversity, mitigate temperatures, decrease air pollution, and increase citizens' sense of community (Ref. 1).
Living Wall at the New Street Train Station
Air pollution is one of the most pressing sustainability challenges in the UK, with particulate levels exceeding both WHO guidelines and EU safe limits in many cities (Ref 6). In 2014, Birmingham was identified by the WHO as one of nine UK cities breaching air pollution safety guidelines (Ref 2, 3).
In 2012, a soil-based green wall was installed at Birmingham New Street Train Station as part of a project aimed at improving air quality, as diesel train services contribute significantly to nitrogen oxide (NOx) pollution. However, most of the plants did not survive. In 2017, Network Rail commissioned a private company to reconstruct the wall using a hydroponic system (Ref 3). The new green wall was installed in 2018 and completed in May 2019 (Ref 1, 3).
This hydroponic green wall not only enhances the urban environment with calming green infrastructure, but also helps mitigate air pollution and promotes biodiversity with the addition of 16,600 plants (Ref 1, 2, 3).
In 2012, a soil-based green wall was installed at Birmingham New Street Train Station as part of a project aimed at improving air quality, as diesel train services contribute significantly to nitrogen oxide (NOx) pollution. However, most of the plants did not survive. In 2017, Network Rail commissioned a private company to reconstruct the wall using a hydroponic system (Ref 3). The new green wall was installed in 2018 and completed in May 2019 (Ref 1, 3).
This hydroponic green wall not only enhances the urban environment with calming green infrastructure, but also helps mitigate air pollution and promotes biodiversity with the addition of 16,600 plants (Ref 1, 2, 3).
The Rio Salado Habitat Restoration Area
The Rio Salado Habitat Restoration Area is a urban green space that transformed a former 5-mile-long city dump into a thriving riparian corridor (2, 3, 7, 9). The project, spearheaded by the City of Phoenix in collaboration with the U.S. Army Corps of Engineers, Maricopa County Flood Control District, and the Arizona Water Protection Fund, has revitalized a degraded ecosystem (9). Through decades of concerted effort, involving government agencies, non-profits such as the Arizona Sustainability Alliance, and community engagement, the area has been restored to a lush habitat supporting diverse wildlife, including over 200 bird species (1, 2, 7). The project aimed to mitigate the pressing issues of urban heat, air pollution, and habitat loss that Phoenix grappled with (1). By creating green spaces, improving air quality, and offering recreational opportunities, the Rio Salado Habitat Restoration Area stands as a testament to the power of collaborative conservation and community resilience (1, 6, 7, 9). The restoration area now boasts hiking and biking trails, a nature center, and various educational programs, making it a community space (3, 7, 9).
Da Nang Tree Planting Initiative
Danang, a prosperous port city in Central Vietnam, is home to a population of 1.2 million inhabitants. Throughout the years, the city went through several boats of urbanization, which allowed its economy to thrive but its environment to be negatively impacted. The city's green areas were reduced, leading to socioeconomic and environmental impacts, including loss of landscape and more energy consumption. (4) Furthermore, the city became vulnerable to natural disasters, which caused destruction and uprooting of trees and vegetation and aggravated soil erosion. (3,4)
To counteract many of these issues, the municipality of Danang initiated several greening activities that included the creation of parks, the greening of street alleys, and the greening of schoolyards as a supporting mechanism for one of Vietnam's nationwide programmes "Plant 1 billion trees in the 2021 - 2025" (5). Recently, the municipality planted 900 Than Mat trees (one of the typical flowering plants of Son Tra Peninsula and scientifically known as Millettia nigrescens Gagnep) along the route from Green Lake to Bai Bac, in the Tho Quang ward, in February 2023. The activity also aims to have an educational role as tree protection is highlighted and build a clean and green city environment (6).
So far, as of February 2023, as part of the 1 billion tree programme, 15,000 trees have been planted in Danang. (2)
To counteract many of these issues, the municipality of Danang initiated several greening activities that included the creation of parks, the greening of street alleys, and the greening of schoolyards as a supporting mechanism for one of Vietnam's nationwide programmes "Plant 1 billion trees in the 2021 - 2025" (5). Recently, the municipality planted 900 Than Mat trees (one of the typical flowering plants of Son Tra Peninsula and scientifically known as Millettia nigrescens Gagnep) along the route from Green Lake to Bai Bac, in the Tho Quang ward, in February 2023. The activity also aims to have an educational role as tree protection is highlighted and build a clean and green city environment (6).
So far, as of February 2023, as part of the 1 billion tree programme, 15,000 trees have been planted in Danang. (2)
Bangkok City Farm
Due to the growing population density and extreme climate events in Bangkok, Thailand, food security has become a more and more pressing issue for urban people. As a response, the Bangkok City Farm project was launched in 2010 by the Food and Nutrition Programme of the National Health Promotion Foundation. Implemented in collaboration with the Sustainable Agriculture Foundation Thailand (SAFT), the project aims to encourage and enable people in urban areas to grow their own food. The project offers financial support to anyone who wishes to start their own urban agricultural project, as well as training courses, access to food markets and knowledge sharing platforms. The implementation sites of the farms varies from private house gardens, community gardens, areas in informal settlements, school gardens and institutional green areas (such as hospitals and factories).(Ref. 1,2) The Bangkok City Farm's role in promoting food self-reliance and food security grew further during the COVID-19. As a result of the pandemic, many people in Bangkok - especially from underprivileged communities lost their jobs and their livelihood and access to sufficient and health food was threatened. Thus, as part of the project, green areas on vacant sites of the city were also created to support the out-of-work people with enabling them for self cultivation of their food. (Ref.6) As of 2022, there are 165 farms in Bangkok created through the project. Given the success and importance of the project, the project was scaled up into a nation-wide initiative called ‘Thai City Farm’. 'Thai City Farm' expanded the network to five other cities in Thailand. (Ref. 1,2)
