Technological

The project addresses a current issue: the integration between cities and the countryside, and the relationship between the urban and the agricultural context. The NBS focuses on enhancing the west peri-urban area of Bologna through the promotion, recovery and valorisation of old rural settlements as new nodes of the productive-fruit network (4). The intervention is extended over 50 ha of municipal property and focuses on natural restoration of the rural landscape and the infrastructure in proximity of it in order to improve local agricultural businesses and recreational activities. As of July 2020, the project is still in full force.

This project was the first green roof in the city of Bologna, and it has been carried out by the University of Bologna in collaboration with the Columbia University of New York with the aim to prove more evidence on green roof stormwater performance. For the Engineering School of Bologna University the existing roofs had a load capacity that was able to host only an extensive roof, without the costly need of being reinforced. In the extensive roof type the vegetation is usually very drought resistant and plants can adapt to difficult environmental conditions, therefore sedum was chosen (1).

The rain gardens of the Great Mosque give an example of a sustainable urban drainage system built 1000 years ago (Ref.1,8,9). The Great Mosque is a world heritage site by UNESCO (Ref. 1); therefore the rain gardens are protected and will continue to provide a sustainable irrigation system needed for the arid climate of Andalusia (Ref. 8,9).

The project is focused on cultivating bazaars for climate-safe and labour-intensive cultivation and is located in an underground space under a shopping and community centre in Högdalen, a southern suburb of Stockholm. This underground cargo space at the shopping centre has been converted to a high-technology farming space that can be active all year-round. The goal is to create a small-scale industry and provide local job opportunities (Ref. 5, 6, 7).

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 Sotos de la Albolafia Natural Reserve is situated on a section along the Guadalquivir River, that runs from the Roman Bridge to the San Rafael Bridge (Ref. 3,14). It was declared Natural Monument in 2001 and is part of the Network of Protected Natural Areas of Andalusia (RENPA) due to its wide variety of birds (Ref. 5,15). "The declaration recognized the environmental value of the Sotos de la Albolafia, a singular natural enclave located in the urban center of a large city, in a monumental and historical environment also unique and with an unparalleled concentration in protected species, especially water birds and wetlands." (Ref. 3)

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.

The Huerto del Rey Moro is an urban community orchard/ garden beside the historic house Casa del Rey Moro. It is one of the only open green spaces in the downtown area of Sevilla where activities of environmental education, leisure and socializing are performed. (Ref 2) The Rey Moro orchard is cited as keeping true to the historic and cultural use of the area since it has been used as an orchard on and off over the past 500 years. (ref 2) Thanks to citizens themselves, as citizens acted to keep it a public and open space against a proposed legislation that would destroy it. (Ref 5)

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 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)