Increase or improve urban vegetation cover to help reduce outdoor temperature

Kota Malang is a city for which urbanization coupled with climate change caused an increase in its vulnerability to the urban heat island effect. One of the solutions found to address this issue has been urban farming which has been recognised and acknowledged as a top strategy to improve cities' resilience associated with social and economic co-benefit. Nevertheless, urban farming inventory in Indonesia is still limited (1). Currently, there are 21 urban farming plots throughout Kota Malang, with 210 active urban farmers involved. The city has adopted this trend since 2013 as part of an initiative called Kawasan Rumah Pangan Lestari (Sustainable Food House Region) and the Initiative of Urban Farming Malang. Alongside the local government, the major stakeholder groups are the Department of Agriculture and Food Security of Malang, Family Welfare Empowerment (PKK) Malang and Bank Indonesia (BI) (Corporate Social Responsibility (CSR) program, which supports the local government in construction and development in Malang.
In Kota Malang, urban farming comprises five types of urban farming: nursery, allotment, residential, institutional and rooftop farming based on its characteristics (1). A recent report showed that urban farming could contribute to community resilience for feeding potential and nutrient sufficiency, especially for targeted populations with the highest risk during emergencies such as the COVID-19 pandemic. In the case of Kota Malang, the cultivation of specific vegetables could feed up to 50,000 inhabitants aged 60-64 years old (1, 2).

IKEA opened its doors in Budapest in 1990. This was the very first store in Hungary. Twelve years later, the store announced that it would install a green roof. The main purpose of the green roof was to compensate the locals for the loss of green space. The green roof was intended to create a biologically active surface that fits in aesthetically into the suburban landscape and provide a home for animals such as pollinators. The green roof, built in 2002, was covered with a Sedum carpet. In 2014, when the original Sedum vegetation died out, the green roof was completely removed. Then, during the autumn 2014 planting, four types of Sedum shoots were seeded. This was followed in the spring of 2015 by the seeding of herbaceous dicots seed mixes, which contained seeds of roughly 50 plant species. The vegetation is regularly monitored by ecologists: in 2021, more than 160 different taxa were recorded, including spontaneously occurring species. The green roof is closed, not accessible to the public, however tours are occasionally organized for professionals [3] [6] [8] [9] [10] [11].

The green roof development forms a 400-meter-long floating green ribbon above the SM North EDSA mall in Quezon City, Philippines. [3] It boasts a 15000m2 area filled with 55 species of native trees, bushes, and flowers that thrive in the local climate, and it relies on stored rainwater runoff to sustain its plant life. Visitors can access the mall via entrances located within the garden's openings and tunnels leading to shops and cafes nestled beneath the botanical landscape. A meandering pathway guides visitors through the space, which features various entertainment options. The garden provides a unique and innovative space for mall-goers and city dwellers to relax and interact with nature. [1,2]

A low-rise building located within Prestige University's existing 32-acre campus in Indore will feature an entirely walkable, stepped green roof. The green roof is planned to be punctuated with courtyards for temperature regulation and accessible to its users (university staff, students and other visitors etc.) from the ground level (1,2). It is designed and implemented by 'Sanjay Puri Architects', Architecture Consultancy based in Mumbai (1,2,6). This building is planned to be used for administration offices, an auditorium, lecture halls, and a library and cafeteria (1,2,3). The green roof mainly serves as a space for recreational activities for the users. The terraces will also include different-sized open-air sections, providing the building's interior with natural ventilation (2,4,5). This project truly blends with the traditional Indian Architecture approach in an innovative and modern way (4,5) and targets problems related to central India's oppressive heat (1,2,4).
Despite the initial target completion date of June 2022 (9), the construction phase of the project has not yet been finalized. The responsible architecture firm anticipates the completion date within the forthcoming months. This information was disclosed in January 2023 (10).

The new office building of the Council of Engineers is located on one of the busiest streets of Bangkok, Thailand. The building aims to combine new engineering technology with aesthetic and function, while maximizing green area and promoting sustainability. The building's terraced green area lead the people up to the entrance on second floor and continue up to the sky garden on the forth floor. The main features of the garden are lush fauna with tree and shrub species, planters, multi-purpose open spaces and bio-filtration system that use plants to filter and divert rainwater. The project aims to acquire the platinum TREES building rating (a green building certificate in Thailand) and it is in the process of applying for the certificate. (Ref. 1,2,3,5)

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)

The Urban Farm Office building, is a concrete-framed structure covered in a "vertical farm" of vegetables, fruits and herbs. The building was constructed by the Vietnamese architectural firm Vo Trong Nghia (VTN) Architects in early 2022 as its own headquarters in Ho Chi Minh City. It aims to promote the production of safe food while reintroducing green space to the city with a façade covered in vegetation. Furthermore, the project also seeks to address the absence of green space that contributes to a number of socioeconomic issues, including air pollution, flooding, and the heat island effect. VTN Architects' idea for the Urban Farming Office includes the area of space-efficient food production in cities through vertical urban farming in addition to the core objective of restoring vegetation to urban structures. (1, 3)

To celebrate the 100th anniversary of Lumpini Park in 2025, Bangkok Metropolitan Administration initiated the extensive renovation of the park. Lumpini Park was the first public park in Thailand. It was first opened in 1925 and had been renovated once 50 years ago. The new Lumpini Park aims to enhance the history of the park, to provide space for people holding different cultural backgrounds and to create space for modern recreational activities, designed for everyone within the framework of 'climate action park' - a green area that has the ability to restore itself, promotes urban farming while also contributes to climate change adaptation through water management, air quality improvement and more. The project will promote high engagement with local people about their vision and concern for the park which will be integrated into the new design plan. The project is divided into three phases. The first phase involves renovating main infrastructures such as roads and water management systems. The second phase involves the construction of green and learning areas such as the resilient park, forest park, urban farming, learning centre and other recreational spaces. The third phase involves the development of underused areas. (Ref. 1,2,4,5,6)