Health and well-being (SDG 3)

The Neela Hauz lake, part of the Neela Hauz biodiversity park, is a natural depression that was once a major source of drinking water for south Delhi, India (Ref 1). Due to nearby road construction and neglect, the lake was filled with solid waste and construction debris for many years. In 2015, based on the request of neighbourhood colonies, the Delhi High Court ordered the restoration of the lake. The Delhi Development Authority (DDA), in collaboration with the Centre for Environmental Management of Degraded Ecosystem (CEMDE) of the University of Delhi, carried out the restoration and revival of the lake using a Constructed Wetland System (CWS). Using the help of natural landscaping composed of oxidation ponds, pebble beds, and furrows having aquatic plants, now the sewage from nearby residential colonies is treated before passing it to the lake (Ref 2). The wetland now converts approximately 1 million litres of sewage per day which has resulted in satisfactory water quality levels (Ref 1). The lake, along with the surrounding biodiversity park, attracts many migratory birds and is also a tourist attraction point in the city. The success story of the lake now has become a model case for the revival of other lakes in the city (Ref 1).

APEC Park is located on the banks of the Han River, in Binh Hien Ward, Hai Chau District, Da Nang City. At first in 2017, the APEC Park was constructed as a cultural work preserving the unique cultural features of 21 economies of the Asia-Pacific Economic Cooperation. In 2020, The Danang local government decided to expand the park as an effort of the city to increase trees and green space in public parks and residential areas to achieve the “green and smart city” goal by 2030 (1,4).
The new APEC Park comprises a public park, a stroll garden associated with an existing sculpture garden, a main stage, a water fountain, a stage for organising cultural events, a playground for children, green areas, a parking space, a lake and underground public toilets ( 1,4). The park is built in an area of more than 8,600 m2, next to the Da Nang Museum of Cham Sculpture. The brickyard and footpath have 25% of the area (752 sqm), and the rest of the land is planted with green trees, grass and statues representing 21 economies of APEC 2017 members in Vietnam (2,4).
Since its inauguration in January 2022 until now, the APEC site has become an ideal place to organize many cultural, artistic and other activities in the Hai Chau district (2).

The Misheel Botanical Garden is a large park located in Ulaanbaatar, Mongolia, established in 2021 along the Tuul River. The project was carried out by "Misheel Group" LLC in cooperation with public actors and more than 100 customer organisations, within the framework of social and environmental responsibility. The project cost 2.1 billion MNT and covers 110,000 square meters of green space, which was beautified without disturbing the native vegetation. The center aims to maintain and restore the ecological balance of flora and fauna, increase the flow of the Tuul river basin by planting trees each year, and provide citizens with more leisure and recreation opportunities. The botanical garden includes a combination of green-blue infrastructure and offers the opportunity for people to relax and expand their knowledge about a healthy environment. The center features a laboratory for students of natural sciences, a basketball court, a sand volleyball court, leisure areas for the elderly and infants, a dedicated sand area, and access for strollers and people with disabilities. The center also includes a terrace with a view of the Tuul River, where visitors can relax, and host events and activities throughout the year, including the winter.
[Source: Information provided by the management team of this project, Ref. 1, 5]

Mérida city developed a Municipal Green Infrastructure Plan (Plan Municipal de Infraestructura Verde), in order to "strengthen the green infrastructure system through planning, design and implementation of urban strategies at different scales of actions and projects that contribute to enriching ecosystem services in the public and private space of the Municipality of Mérida" (Ref. 1). The plan has four axes, providing a comprehensive and transdisciplinary approach to integrating nature-based solutions into city planning and the design of public spaces in order to provide climate change adaptation and mitigation benefits (Ref. 1).
The Mérida Green Infrastructure Plan shares strong ties with a state-wide strategy, 'Arborizando Yucatán', which promotes reforestation efforts across the 106 municipalities of the state in order to "help reduce the effects of climate change, have more areas green and a better climate for the benefit of current and future generations of Yucatecans" (Refs. 3 & 4). At both the municipal and state level, the relevant administrations (Mérida City Council and the State Government, respectively) have signed an agreement (Declaration for Mérida 2050), whereby both pledged to plant at least 200,000 native trees in the City of Merida, running alongside both the Mérida Municipal Green Infrastructure Plan and the Aborising Yucatán Strategy (Ref. 2).

In April 2021, the Kochi City Corporation in collaboration with the World Resources Institute (WRI) and ICLEI South Asia inaugurated the Subhash Bose Park after a thorough renovation. The project was part of the overarching project "INTERACT-Bio" by ICLEI South Asia and the KAWAKI initiative by the WRI (part of the Cities4Forests movement in Kochi). The initiative was launched to demonstrate the application of Nature-Based Solutions (NBS) for climate mitigation in Kochi. The project aims to develop urban grooves similar to the traditional grooves that once existed in Kerala. Additionally, with this project, ICLEI South Asia aimed to address the problems of climate change through mainstreaming biodiversity objectives across the city. The park plays as a major carbon sink at the heart of the city that is home to over 300 species of native trees and many more species of native plants. Furthermore, the Kochi City Corporation is focused on increasing native biodiversity and communicating the importance of this biodiversity to residents in order to ensure long term conservation efforts. This was a key motivator for the city in the conceptualization of the garden which not only improves the native biodiversity of the city but also serves as a demonstration site for nature education. The park also includes a newly built pollinator garden that has augmented the pollinator base in the city. [1, 4, 7, 10]

Droughts are one of the most serious threats to water availability, food security, and local livelihoods in the semi-arid areas of Tanzania. Drought condition is coupled with a rainfall deficit and poor rainfall distribution. In Tanzania, drought conditions are observed more frequently in the country's northern and central portions (Arusha, Manyara, Shinyanga, Simiyu, and Dodoma). This consideration was paramount when in 2019, the Municipality of Dodoma, alongside ICLEI - Local Governments for Sustainability, erected a new garden positioned in a square in the centre of the city. Nyerere Square in Dodoma used to be an open, concrete space with the statue of Julius Kambarage Nyerere the only attraction apart from the informal traders scattered along the main walkway. Nyerere is the former prime minister and president of Tanganyika, as Tanzania was known before, and subsequently president of Tanzania. It would prove challenging to sustain such an initiative in this drought-prone city. To ensure the park outlived the project, the team installed a greywater system to irrigate the new garden and ensure there was always sufficient water to help the plants flourish. (1,2,3)

Delhi Development Authority (DDA) has established a network of Biodiversity Parks in Delhi with unique landscapes that harbour a diversity of plants, animals and microbes living in ecologically sustainable biotic communities and rendering multiple ecological services. Presently there are seven Biodiversity Parks developed by DDA located across the landforms of Delhi. These parks have a mosaic of habitats with rich floristic and faunistic diversity that function as a dynamic ecosystem. They have ecosystem processes such as organic matter decomposition, regeneration of plants, pollination, resting and nesting of birds and colonisation by other animals. The biodiversity parks in Delhi have proved to provide extreme essential services by creating ecological corridors and maintaining the genetic diversity in an urban setup. Furthermore, these parks have shown substantial potential in storing carbon and other pollutants and help in mitigating climate change. [2, 3]

A new nature sanctuary was unveiled at the Kingfisher Wetlands, Gardens by the Bay, in Singapore in 2021. Before the sanctuary was created, the original site was a popular bird-watching spot for the birding community and nature photographers. However, it was isolated and "often missed by the general public". The new Kingfisher Wetlands was thus developed with the aim of enhancing and enriching the Gardens, as well as providing new nature areas for visitors to explore. The place is a new hotspot for the flourishing diversity of exotic flora and fauna. Furthermore, the project helps in mitigating climate change through mangrove plantations. Over 200 native true mangrove trees and mangrove associates have been planted, contributing to sustainability by storing “blue” carbon. Additionally, the project actively supports research into blue carbon science. This contributes to the country's effort to transform Singapore into a City in Nature by weaving nature more intensively into the urban fabric. [1, 4]

The Chulalongkorn University (CU) Centenary Park was created to provide a green space for the city and celebrate Chulalongkorn University’s 100th anniversary. Located in the centre of shopping and commerce, the park is designed as a multi-functional “urban forest”, which serves as an oasis for the residents and visitors of Bangkok, who can spend quality leisure time in a lush and pleasant environment. The park includes constructed wetlands with rain gardens, retention ponds, an underground water drainage system and green roof areas. Opened in 2017, Chulalongkorn Centenary Park is the first critical piece of green infrastructure in Bangkok to mitigate detrimental ecological issues and disaster risk reduction. Unlike other public parks around the city, this one is the first in Thailand to demonstrate how a park can help reduce urban flood risks and help the city confront climate change, all while offering city dwellers a place to reconnect with nature. Designed with various ecological design components, the park reminds the city of ways to live with water rather than fear it. [1, 2, 4]

The Ras Mekonnen Urban Park is part of a larger intervention developed by ICLEI (an international NGO focused on the promotion of sustainable development) with the Addis Ababa municipality alongside the Shega river that crosses a nearby neighbourhood. The location of the park was initially used by locals as a dumping site affecting not only the quality of life of the inhabitants but also contributing to the environmental degradation of the area. As more and more people discarded their waste here, the small river running through the site, a tributary of the Shega River, became increasingly overgrown and inaccessible, resulting in a derelict, run-down space in an otherwise vibrant urban area. As such, action was needed, which eventually resulted in the rehabilitation of the river and the creation of the park, which now can be enjoyed by all the inhabitants of the Ras Makonnen neighbourhood. (1,2)