Measurements of biophysical aspects of the NBS (e.g. temperature, water flow)

Fornebu used to be Norway’s main airport, but was abandoned in 1998. The Fornebu project aimed to restore the 340 ha site in order to provide a sustainable, multi-use built environment with sustainable drainage systems and other green infrastructure in focus. The site now consists of residential and industrial buildings with a focus on green space and natural storm water management, involving the use of open and natural water retention methods, including swales, filter strips, permeable surfaces, detention basins and retention ponds (Ref. 1).

The Air Pollution Garden (APG) in the UK has been established at Sheffield Botanical Gardens through a collaboration between the three White Rose universities of Leeds, York and Sheffield. Typically an (APG) size is 6x8m and contains plants that are particularly sensitive to damage by pollutants like nitrogen dioxide (NO2) and ozone (O3) present in the air. The project owners hope to raise public awareness of air pollution effects in a tangible manner and change people’s behaviours (ref1).
In 2017, the city council hosted AirFest to push this initiative further (ref 8), a ‘Phyto-sensor’ toolkit was created by the Citizen Sense research group at the University of London to help identify the best locations for Air Quality Gardens (ref 6) and published the Air Quality Annual Status report (ref 7). In 2020 the project is considered as completed, although there are several different other projects in planning.

This NBS is part of the new Porta Nuova area, an extended urban transformation of a neglected area of Milan. It consists of two residential towers of 110 and 76 m height hosting 800 trees and over 20,000 plants from a wide range of shrubs and floral plants distributed according to the sun exposure of the facade. On flat land, each Vertical Forest equals, in amount of trees, an area of 20,000 square meters of forest. In terms of urban densification it is the equivalent of an area of a single family dwelling of nearly 75,000 sq.m (3).

A recovered green area next to the Guadaira river, it opened as a park in 2014 (Ref 6). In its planning it reconciles the historical use of the river to power the historic mill and its new use as a green corridor on the Eastern part of the city. Its large dimension allows it to fulfill the quadruple ecological, landscape, leisure, and non-motorized mobility dimensions. (Ref 4,5,6). The park was officially inaugurated but it continues to face challenges. In 2007 the economic crisis led to construction being stopped and the budget of the park cut from 23.8 million euro. Construction was started and the budget re-established at 17.2 million in 2011. (Ref 5)

A 40 m2 vertical garden installed on one of the clinic's walls in 2012. It was the first vertical garden to be constructed in a hospital in Europe. It aimed to create a pleasant and relaxing atmosphere for visitors and patients at the clinic, improve the air quality and humidity of the complex and beautify the space of the hospital. (Ref 1) Over 1400 plants with over 40 species were included in the vertical garden (Ref 2).

‘Slussen and a new water regulation plan for Lake Mälaren’ is part of the rebuilding of the city district Slussen (The Slussen Project) (Ref. 1). In connection with the rebuilding of Slussen, SMHI (Swedish Meteorological and Hydrological Institute) was in 2007 commissioned by Stockholm City to review and propose a new regulatory strategy for the lake Mälaren (Ref. 2). A new regulation prevents floods, reducing the risk of saltwater entering the lake, benefiting the natural environment around Mälaren. Further effects will also benefit the ecosystem of the lake (Ref. 3).

Oslo municipality is underway with the large-scale project of opening up rivers that previously were running in underground pipes. Alna Environmental Park is a part of this project and includes major transformation and environmental upgrade of the river Alna. The Environmental Park runs along the river and has transformed grey structures to accessible parks and recreation areas and now acts as an important resource for Oslo's citizens. Central aims of the project are to improve the self-cleaning ability of Alna, while maintaining biodiversity in the region and to inspire future urban development. (Ref. 1, 3)

Hammarby Sjöstad is the first eco-city district in Stockholm. It is a 'town around a lake' where the planning work begun in the 1980s with an opportunity to expand the inner city of Stockholm. It is one of Stockholm's biggest urban development project and it focuses on water, energy and eco-friendly solutions. As a part of the ambition to create an eco-friendly city district, investments in e.g. green spaces, walkways and several large parks have been made. Furthermore, the Hammarby Model is the eco-cycle which describes environmental solutions used for energy, waste and water and sewage. It was established with a focus on 7 key areas: soil remediation, urban form, transportation, green buildings, energy, waste management, and water efficiency. (Ref. 1, 2, 11)