Point location, which indicates where the NBS takes place

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).

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)

Eko Ekipa Prečko is an alternative urban garden in Zagreb which was initiated and promoted by the locals. The initiative was not supported by the government initially. Regardless of the lack of support, citizens jointly cleaned an illegal waste disposal site and the bushes and shrubs there to initiate a communal garden. Besides ecological food production, they also organize educational workshops for children and adults to get familiar with life in nature (Ref 1). People of all ages, the majority between age 30 and 40, from Prečko and neighbouring districts are involved with the garden (Ref 4).

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)

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).

Via Gandusio is a social housing complex in the North of Bologna that was originally built for hosting workers that migrate from South Italy in the 60s. Nowadays, it hosts two different communities: advanced-age Italians and current international immigrants. The differences create some conflicts and limits relationships among the community. In 2010 a group of researchers tried to implement a community garden that was designed with the aim of setting a meeting point for the community where food production is the link between neighbours to exchange knowledge, culture and experiences. The 250 m2 roof garden started in 2011 becoming the first of the city of Bologna and of Italy (Ref. 7 and 8).
Over the years the project has undergone changes and variations, has seen the end of funding and known voluntary management (2013). Since 2013 there is an urban vegetable garden cared for by some residents with the support of the Biodiversity association. (Ref.10)

The ‘Art Natura’ design was a submission to an ‘Ideas Competition’ for the Headquarters of the College of Architects of Córdoba. The design plan aimed to include nature in public spaces, through the use of a vegetal facade with a low irrigation system to transform the enclosure into a skin capable of compensating the differences of temperature and humidity in the different building planes. (Ref. 2)

This intervention is a community garden initiated in the unused spaces of the Pablo de Olavide University campus. The garden and cultivation is open to the university community, students, professors, and faculty have the opportunity to apply for shared parcels and co-manage their piece of land from the planning stages to the planting and the cultivation. The intervention is also connected to the institution's education with certain classes and workshops using its managing model and space for learning purposes. (ref 1,5,8,9)