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To address the mismanagement and illegal deforestation in the Changa Manga forest, the Punjab Government in Pakistan initiated strict actions with the help of the Forest Department between 2014 and 2017. Activities included planting new trees and taking action against illegal deforestation. Over the years, mismanagement and illegal deforestation decreased this woodland by 75% (measured in 2012) (2). The Government of Punjab approved the “Afforestation in Blank Areas in Changa Manga Plantation” project for the duration of three years from 2014 to 2017 aimed at the afforestation of a total area of 200 acres on flow irrigation during 2014-15 and maintenance of afforestation during the two subsequent years (2015-17) (4). Changa Manga Forest is one of the world’s oldest hand-planted forests, dating back to 1866 in Chunian City. It spreads over about 5065 hectares and hosts a wide variety of flora and fauna. The forest is home to 14 species of mammals, 50 species of birds, six species of reptiles, two species of amphibians, and 27 species of insects (1). Some exquisite tree families, such as Sheesham (rosewood). white mulberry and Kikar trees are found in this woodland (2). It also includes a wildlife preserve, which was launched in 2005 by the World Wildlife Fund (WWF) Pakistan to protect white-backed vultures and ensure their captive breeding in the forest (3). Currently, Pakistan is losing forests at thrice the rate of the other South Asian countries. One of the major benefits of the Changa Manga Forest afforestation project was that it increased honey production by 70% in the different areas of the forest park (5).

Balili River, situated in the province of Benguet, is among the many urban rivers in the Philippines that suffer from severe pollution due to various human activities. Indiscriminate dumping of waste in almost all of its 23 tributaries is a significant contributor to the pollution. Despite this, the river remains a critical source of irrigation for farmers in La Trinidad who primarily grow strawberry and salad crops in the valley. However, the use of contaminated water from the river poses a direct threat to the food safety of consumers of these crops. Moreover, during the summer, the black water of the Balili River is a constant eyesore in the community. To address these environmental concerns, a pilot study was conducted aimed at exploring treatment options for the polluted water in Balili River. The study focused on assessing the use of local plants to restore biodiversity, conserve wildlife habitats, and test the phytoremediation potential of local macrophytes. The pilot area was established within the Organic Farm of Benguet State University near the main stream of the Balili river. The study set up two types of constructed wetlands (CW), a surface flow CW for floating plants and a horizontal subsurface flow CW for emergent plants. The results of the pilot study suggest that constructed wetlands could be an effective solution for cleaning up the Balili River. The implementation of constructed wetlands in Balili River can not only improve the water quality but also benefit the local community and ecosystem. [1,2]

The United Nations High Commissioner for Refugees (UNHCR) and its partners collaborated in 2018 to develop an ecosystem restoration project in the Rohingya Camps of Ukhiya, near Cox's Bazar. The main objective of this project was to mitigate the increased risk of landslides, slope instability, and flooding caused by flash floods and the vicinity of the Bakkhali River. The intervention included the planting of quickly growing native trees, shrubs, and grass species. Additionally, the project encompassed other measures such as vegetable cultivation on stream beds, biological soil stabilization methods, and plant-based wastewater treatments. To ensure the sustainability of the project, a network of future practitioners from the Bangladeshi and Rohingya communities was created. Moreover, environmental education and awareness activities were undertaken to complement the efforts of the project, with a particular focus on engaging young people from both the host and refugee communities to maximize its impact. The area where the project was implemented has been significantly affected by land and forest degradation over the last few decades, which has been exacerbated since the arrival of Rohingya refugees in 2017. Therefore, the project also involved other stakeholders such as the International Center for Conservation of Nature (IUCN), the Danish Refugee Council, the World Food Programme, the International Organization for Migration, and the Bangladesh government, each contributing in various capacities to achieve the project's objectives. (1,2,3,4)

Vinh is the biggest city in north-central Vietnam and is the hub for economic and cultural development in the region. As of 2018, the city has a population of approx. 500,000 inhabitants and is located on the Ca River delta, 160 miles (260 km) south of Hanoi. Flooding and poor environmental sanitation are major impediments to the development of Vinh City. The drainage system of the city is comprised of four catchment basins connected to Rao Dung, Ke Gai, Vinh and Lam Rivers. Among the four, the Vinh River is flowing through the central wards and communes of Vinh City and is one that becomes sensitive to severe flooding events frequently (2,3).
Recently (in 2021), with support from the World Bank, the government initiated a program, the Vinh City Priority Infrastructure and Urban Resilience Development Project (VPIUR), which is expected to bring a new look to the river, reduce the risk of flooding in urban areas and strengthen urban management capacity to adapt to climate change. This project has several sub components and one of them is a river rehabilitation and upgrade under the form of riverbank green, sanitation, and flood risk management (1, 3).
The implementation includes a comprehensive set of structural and non-structural interventions, including flood control systems and nature-based solutions, wastewater collection and treatment infrastructure, and key transport links. The project aims to transform it into green public spaces which are to be constructed under the project. The project also aims to invest in developing green public spaces along the Vinh riverbank and a new regulation lake. (3)

In 2005, a constructed wetland was established in Barangay Villareal, Bayawan City in order to improve a peri-urban settlement and promote domestic wastewater treatment with reed beds. The wetland covers an area of 2680 square metres and comprises two reed beds, with the first bed utilizing perforated pipes beneath a sand and gravel substrate for vertical flow filtering, and the second bed utilizing horizontal flow for biological filtering. The roots of the Phragmites karka reeds, which are used in the system, act as a natural filter, removing microorganisms and pollutants. The treated effluent is reused for various purposes, such as watering plants, firefighting, and irrigating ornamental plants and agricultural crops. The overarching objective of the initiative is to safeguard coastal waters from pollution caused by domestic wastewater and enhance residents' quality of life by providing safe sanitation and wastewater treatment facilities. Furthermore, the initiative seeks to showcase the effectiveness of constructed wetlands, encourage the use of locally available reeds for wastewater treatment, and conserve water and nutrients by reusing treated wastewater. [1,2].

The "Urban Forest" project focused on the establishment of the Mongolian-Korean Friendship Forest on a 40-hectare land in Dambadarjaa, Sukhbaatar district of the capital city, Ulaanbaatar. Previously known as the Forest Research and Development Center Arboretum Park, this area has a river running through it. The project, with a total cost of over 8 million EUR, was designed specifically to reduce air pollution in the capital, to create a healthy eco-environment for Ulaanbaatar residents to spend their leisure time and to raise awareness of the importance of forests and the benefits of trees in Mongolia. In total, 55,000 trees and shrubs of 36 different species were planted so far and the park boasts five different types of coniferous trees that thrive in Mongolia, including larch, pine, abies, cedar, and spruce, as well as deciduous trees such as birch, aspen, willow, lilac, and maple. The Urban Forest park also includes several facilities, such as a visitor information center, a playground, sport facilities, a natural arboretum and a ground fountain. The park will be operational and accessible to the public in 2023. The project was implemented between 2017 and 2022, as the second phase of the Korea-Mongolia Greenbelt Reforestation Initiative jointly developed by the Mongolian Ministry of Environment and Tourism (MET) and the Korea Forest Service (KFS). The Green Belt initiative was created with the overall aims to mitigate desertification, combat climate change, and reduce yellow dust and sandstorms in Mongolia.
(Ref. 1, 2, 3, 4, 5)

Sky Park One Islamabad is an innovative high-rise apartment building project, located in the heart of the prestigious Gulberg Greens in Islamabad (2). The building has been designed with a unique concept that features a rooftop level garden with ample plantation. It aims to enhance the quality of life for the residents and provide them with facilities for relaxation within the apartment building (3). The rooftop garden spans an area of 9 Kanals (about 650sq.m) and features 7 green courtyards in the building. The 152 residential apartments are all connected to the joint courtyards (2, 3). Rooftop garden are still very rare in Pakistan (5) and as such, the project provides an example for the green vertical housing in Pakistan with a focus on energy efficiency (1).

Since 2012, the Municipality of Ipoh continued the revitalization and rehabilitation of the D.R. Seenivasagam Recreational Park (TDRS) under the Malaysian National Urbanisation Policy, which suggests that for every 1,000 inhabitants, there should be public green open spaces of 2 ha. Through this intervention, the Ipoh municipality tried to address several sustainability challenges, which are usually a result of the lack of green open spaces. Some of the challenges addressed were the urban heat island effect, soil erosion resulting from improper drainage, and noise pollution. Ultimately, the municipality aimed to provide a convenient setting for a variety of leisure and recreational activities in addition to enhancing the civic values of the community. The intervention consisted of several tree-planting actions organized by the Ipoh Council in collaboration with the Perak Government (a Malaysian state that has its capital in Ipoh).
D.R. Seenivasagam Recreational Park was built in the 1950s and is one of the largest urban parks in Ipoh. It has become a favourite among locals as well as an example of good practice for integrating green open spaces in addressing sustainability challenges over the years. Located in the vicinity of the Kinta River, during the early days of its opening, it was a mini botanical garden which eventually transitioned to a full-scale park, one of not too many in Ipoh. The park also includes a lake with wooden bridges that contributes to the diversity and habitat of the place. The DR Park, as it is known to the locals, has entertained many families for more than 25 years, starting as a mini-theme park during its formative years, much to the delight of many children. To date, the park has remained a popular spot with abundant greenery and attractions, an oasis within Ipoh’s city life. (1,2,3,4)

The 'Wat Hua Lamphong Rukkhaniwet' Park was developed by the we!park group, which is part of the ‘Green Bangkok 2030’ project network, aiming to increase the amount of green space in Bangkok. It is a small pocket park in the busy business district of Bangkok, Thailand. The land was abandoned for many years before being donated to the city for public use. We!park applied participatory space development methodology to optimise and tailor the area to its soon-to-be users' needs. As part of this approach, the local community and all the potential users of the park were involved in the form of various surveys, interviews and workshops. Bringing in multiple ideas was a cornerstone of the project planning process - all to create an inclusive garden with elements from everyone in the neighbourhood community - a concept called 'garden next door'. The park has three main parts to accommodate different activities enabling relaxation, and physical activities, and providing space for educational and cultural events. (Ref. 1,2,3,4)

Raipur city is known as the seventh-most polluted city in the world (2, 3, 4). In response to the escalating problem of air pollution and its public health effects, the state of Chhattisgarh in India has envisioned the creation of a verdant and healthy natural space for urban inhabitants in the heart of Raipur - the Oxi-zone (3).This project acts as the 'Breathing lungs for Raipur' (1, 2). Approximately 19 acres of land were allocated to create an ‘oxy-zone’, including the demolition of buildings to plant trees in their place (1, 2, 4). Inspired by the iconic Central Park of New York City, and suggested by a local citizen group, the Oxi-zone aims to transform this area into a thriving habitat for diverse species of trees and plants, which will also provide water bodies to replenish the groundwater in the vicinity (2, 3, 4). In summary, this project is an integrated green space, enabling residents to relax, meditate and exercise within the “shadow of nature” (3, 4).