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Kronsberg was built as a model district of sustainable urban development for the EXPO 2000, which motto was 'Humankind-Nature-Technology'. In the previously intensively farmed area, 3200 new dwelling unit was built. Among other sustainable technologies, the planners of the district developed a quasi-natural drainage system that aimed to provide the municipalities a sustainable alternative for traditional drainage (Reference 1, 2).

20 years after planning started in 1992, EXPO district of Kronsberg has proven its viability in terms of sustainable urban development and provided important foundations for advanced urban planning of new buildings in Hannover and elsewhere. The project was showcased in the ‘Crystal’ exhibition pavilion in London as a global standard for integrated construction. The ‘World Cities Summit 2012’ in Singapore also paid tribute to the residential area as one of the world’s hundred most innovative infrastructure projects (Reference 1, 2013).

A water park has been constructed for the treatment of the pumped groundwater and stormwater from Roslagsvägen. A sedimentation basin is being built by the Swedish Transport Administration in connection with the construction of the Northern Link. The stormwater is led via an overloaded sedimentation basin, which is also supplied with large amounts of leaking groundwater from the metro. The goal is to reduce the phosphorus supply by about 25%. (Ref. 3,4)

As part of the restoration of park Denis Gardens, an innovative water element was built consisting of water flowing down the stairs, circulated and cleaned by a pump and filters. This helps regulate the local microclimate by reducing temperatures in hot days and creating humidity in the air (Ref. 1; Ref. 5). Also, the element allows people to walk bare-footed and cool off. In addition, the water reduces air pollution by extracting dust from the air, and the structure has an aesthetic and recreational function, with a restaurant underneath. (Ref. 1; Ref. 2; Ref. 6).

The Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust (BBOWT) 'Water Vole Recovery Project' is working in partnership with the Environment Agency, the Canal & River Trust and Thames Water to monitor water voles. Water voles have undergone one of the most serious declines of any wild mammal in Britain during the 20th century. The intensification of agriculture in the 1940s and 1950s caused the loss and degradation of habitat, but the most rapid period of decline was during the 1980s and 1990s as American mink spread. Between 1989 and 1998, the population fell by almost 90 percent! The above project also is identifying habitat enhancement opportunities and influencing local landowners to manage sites sympathetically for water voles and implement mink control. (Ref. 1)

In the new district ‘Kop Zuidas’, water green strip is created along the sidewalk in which stormwater is temporarily stored by means of high-grade vegetation and a drainage system. The stormwater slowly infiltrates into the soil and only reaches the sewage system in case of extremely heavy rainfall. It is a pilot project for stormwater retention and will be upscaled throughout Amsterdam when successful. (1,2)

The Barr Foundation started the cross-cutting program called Waterfront Initiative to support the sustainable planning and accessibility of the waterfront area while also increasing residents awareness and environmental stewardship of the waterfront. The Waterfront Initiative initially supported organizations in harbour planning, designing waterfront parks, and climate resilience efforts along the Boston waterfront. In 2018, it has also strengthened its focus on social equity and public engagement across more vulnerable neighbourhoods around waterfront issues (1,2)

Weaver Park is was built on an area of 0.6 ha in the Liberties area in Dublin. It is one of the developments that form a part of the Liberties Greening Strategy. The park’s purpose was to address the lack of green space in the area, to provide a place for skateboarding and other recreational activities, and a place for relaxation and community events. (Ref. 1; Ref. 5)

Weaver Square Community Garden started in May 2011 on a derelict site owned by Dublin City Council. The site contains the Community Garden and 28 individual allotments let out by the council. The main focus of the Community Garden is to create a safe and relaxing green space for all to use and enjoy. The organizers hope in the future to have more emphasis on the garden as a learning experience, with open days & workshops and other related talks. Dublin City Council has given notice that Weaver Square Community Garden and 27 family allotments are to close at the end of 2018. (Ref. 1; Ref. 2; Ref. 3)

The Werd Administration Centre contains a green park that provides a good variety of trees with an aesthetic view of the city. Ornamental cherry trees create a lively atmosphere, in the spring with their double-blossom flowers, and in the autumn as their canopy changes colour. This park has been renovated a few years back to increase habitat diversity. The building itself got another renovation in 2014. (Ref 1)

With the decline in industrial use, the grey harbour landscape of Frankfurt am Main became a habitat for rare plants. In 1986, the city council ordered transformation of the former industrial area into a public green space between the Main and the new residential area in the Ostend. The bright, spacious park with 2.1 ha surface was finished in 2000 (1) now welcoming locals for recreation and exercise while it also hosts a cultural summer festival and gives a home for local wall and fence lizards (1).