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In 2015 an innovative project called the "Sweet City" (Ciudad Dulce) was launched in Curridabat. Its main goal was to bring wild spaces into 21 urban neighbourhoods of Curridabat ("spaces of sweetness") and eight corridors ("transitions") and thus linking neighbourhoods and parks through a participatory re-design approach with local stakeholders [3]. The main objective of the Sweet City model is to reintroduce biodiversity into the urban space by focusing on five fundamental dimensions: Biodiversity, Infrastructure, Habitat, Co-existence and Productivity. The interventions of this project included park improvements, sustainable drainage systems, the protection of wetlands, spring water recovery, promoting organic farming practices, and many strategies that help improve biodiversity and motivate citizen participation, finally, as ecosystem-based disaster risk reduction measures and climate change adaptation actions [1].

Assiniboine Landing is a 21 ha housing development to raise the bar for environmental responsibility and evolve the landscaping practices in local communities, particularly regarding stormwater runoff and retention, and parklands. It is one of the neighbourhood communities developed by Qualico Communities in cooperation with Native Plant Solutions, a branch of Ducks Unlimited Canada. The project resulted in integrated systems of native grasses, shoreline vegetation and wetlands, creating communities conducive to the cycles of nature and offering stunning natural landscapes for residents to enjoy (1,5,6,7)

The Recreio green corridor project, launched in 2012 by the Municipal Secretariat for the Environment and several city departments, aims to protect and enhance the rich biodiversity and ecosystems of the area, to help with the resilience and adaptation of the west side of the city, an area affected by coastal flooding and erosion. The project mostly focused on preserving, connecting, and expanding the existing local urban nature elements and protecting their ecology. Lastly, the project also aimed to educate the residents about native vegetation and help build social interaction and cohesion between the local communities [Ref 1]. The project was designed to preserve and connect 320.76 ha of protected areas and add 60.73 ha of open public spaces and squares. And in total, the corridor has a linear extension of close to 8 kilometers, passing through very diverse urban areas (Ref. 7), including natural parks, a lagoon system, water canals, and social housing areas.

In 2018, a new annexe building to the Parliament of Victoria was built to host the increased number of municipal employees. The new building is located in the heritage garden that surrounds the parliament precinct of which one hundred per cent of the footprint has been crowned with two new flourishing rooftop gardens that merge the building into its extraordinary landscape setting (1). The new garden is one of the biggest rooftop gardens in Melbourne and accommodates 300 mostly native plant species that characterise the Australian meadows with wildflowers, grasses and shrubs (2). During the construction of the annexe building and the landscaping of the rooftop garden and the connected sunken courtyard key elements of the heritage garden were protected as touchstones for example a Federal Oak planted in 1890, a Norfolk Island Pine and a camphor laurel ( 7). The garden encourages greater biodiversity within the dense urban context, provides thermal insulation to the new building and creates social spaces for events, announcements and contemplation (2).

Mexico City's (CDMX) Water Fund was established in 2015 by The Nature Conservancy Mexico on behalf of the Latin American Water Funds Partnership aiming to reduce the imbalance of the aquifers providing significant water supply for the territory of the CDMX and promoting positive long-term water balance (1). "The Water Fund emphasises good science in relation to the selection of sites and interventions, and in comprehensive monitoring. It seeks to make the business case demonstrating that these activities show returns with respect to water security" (1 p22). The first pilot project of the CDMX Water Fund engages small-scale producers in sustainable agriculture practices, works to restore and conserve water-absorbing land and reconvert land to water-friendly agriculture practices (1)

Two River Urban Park is a public space located towards the confluence of the Liesbeek and Black Rivers and is one of the largest urban green lungs in the City of Cape Town. It is approximately 240 hectares in extent. The Park comprises sensitive ecological systems and habitats, extensive open space areas, institutions, historical buildings and cultural landscapes (2). The City of Cape Town and the Western Cape Province own significant proportions of the park and in 2011, the Western Cape Government started considering the sustainable redevelopment of the TRU Park into a mixed-used urban green area including housing development, heritage protection, the rehabilitation of the degraded environment and recreation opportunity creation (1). Since 2016, the project has been on hold due to the modification of the planning law Local Spatial Development Framework that affects the redevelopment plans of the Two Rivers Urban Park (1).

The City of Melbourne, through its Urban Forest Strategy, has a comprehensive plan for greening major streets and precincts, but not the smaller laneways. Across the municipality, laneways occupy a ground area of 60 hectares, with a further 150 hectares of space on the walls in these laneways (3). "The City of Melbourne has established the GYL program in 2016 with the vision to help transform the city’s smaller laneways into leafy, green and better usable spaces for the residents and other visitors to enjoy while addressing the city’s sustainability challenges." (1 p27). So far, a pilot project has been carried our including the transformation of 4 laneways: Coromandel Place, Guildford Lane, Meyers Place and Katherine Place (1,3). The intervention included an intensive planning process with the involvement of stakeholders from the private and public sectors and the creation of an interactive map of laneways ideal for greening. (1,2). The GYL program aims to address the issues of urban heat islands, climate change impacts of flood mitigation while also improving local aesthetics, amenity and creating opportunities for recreation (1).

The Urban Forest Fund (UFF) was launched in May 2017 by the City of Melbourne to provide financial support to new greening projects that otherwise would not be able to be funded. Such projects include green spaces, tree planting, vertical greening or green roofs on private land" (1 p20). The City of Melbourne has multiple strategies and programs in place to increase the quantity and quality of green space in the city. The UFF aims to support such sustainability lead initiatives by providing match-funding grants to green projects in the private realm. The UFF is a key initiative in tackling sustainability challenges in the entire city, as 75% of its land is privately owned (1)

"The Urban forest strategy (UFS) is a central part of an innovative overarching policy framework of the City of Melbourne underpinning the city's aim to create healthy ecosystems for people and nature" in the period between 2012-2040 (1 p9). The UFS outlines a scientifically-vetted long-term process to re-nature the city with a diverse selection of urban trees and open space for and with the citizens, combining elements of an eco-managerial governance arrangement with an open and reflexive co-governance approach. (1 p11). The Strategy concentrates on 6 areas to achieve its goals: canopy cover, forest diversity, vegetation health, water quality and soil moisture, urban ecology and environmental stewardship among citizens. (1)

The Mary Ellen Welch Greenway (previously East Boston Greenway) is a mixed-use pathway and linear park built on a former rail corridor" linking several parks in the neighbourhood and also connecting the East Boston district to the beachfront (1, p23). In the 1950s after the Consolidated Rail Corporation stopped using the railways, it became a derelict dumping ground. To the initiation of a local community organisation with the collaboration of governmental authorities, the redevelopment of the area has started as a rail-to-trail conversion program. When completed, the Greenway will link several important open green spaces in the East Boston neighbourhood, increase the acres of park per resident in the area, provide a place for recreational activities and direct greenway to the Boston Harbor (1). Furthermore, with water management amenities the area would serve as a buffer zone in case of flooding by barricading the waterfront. (1)