Municipal / city level environmental plan or programme

The Queluz Green Bridge is a pedestrian link that includes the creation of continuous green space in the natural areas adjacent to the gardens of the National Palace of Queluz, with connections to the Palace Square and Quinta Nova, and the Parque Urbano Felício Laurel. Integration of the landscape by the integration of an acoustic barrier in the slope with vegetal cover, and by the green bridge of connection between the gardens of the Palace of Queluz and Matinha was also scheduled. (2)
In 2020 the Municipality of Sintra signed a memorandum for the construction of the Queluz Green Bridge, inserted in the Green and Blue Axis project. The approval of these documents allows the launch of the construction contract for Ponte Verde in the first half of 2020 (5).

The Haumanngarten is a community garden in Essen founded by the Transition Town movement (Ref. 1). Since May 2015 a mixed group have been growing vegetables, herbs, flowers and berries on a former playground. Fellow gardeners with and without knowledge of gardening participate in the garden (Ref. 2).

The Molenvlietpark is a large park in the Viletzoom area of The Hague which will serve as an ecological corridor and stormwater storage. Beside flowery grasslands, the park has several interconnected ponds serving as water storing facilities that can temporarily collect a large amount of water during heavy rainfall. The green and blue areas with diverse vegetation provide habitat for a large variety of species and a fish spawning ground supporting biodiversity (1,5,6,7). It will also include paths for cyclists and pedestrians. (1) The first phase of the park construction has been completed, while the second phase is planned to be executed in 2021-2022.

The Strasbourg Grandeur Nature Plan is engineered by Strasbourg Metropole and is focused on optimising the actions and resources and resources of local authorities in the maintenance of local biodiversity and improving the living environment (Ref. 7). It combines with local associations and citizens through organising interfaces (e.g. workshops, online tools) that allow relevant local authorities to engage with local projects and make interventions on the basis of proposals made by the community. The project aims at improving the maintenance and development of green spaces and biodiversity due to the environmental issues surrounding urban sprawls (Ref. 4).

The main problem of Lake Ülemiste is high phytoplankton biomass, which increases the cost of water treatment (ref 1). Improving the water quality of Lake Ülemiste by biomanipulation has been considered as a management alternative. Lake Ülemiste was bio-remediated after reduction of external loading and the shifts in water quality were studied during the active-phase of the measure. (ref 1). Tallinn obtains 88% of the water it needs from Lake Ülemiste. Pine forest in the sanitary protection zone surrounding Lake Ülemiste offers several ecosystem services that help to improve the quality of the city’s drinking water (ref 4).

This project aimed at the reconstruction of the Lepiku channel that is part of the drainage system, which starts next to the Tallinn Botanic Garden and includes wetlands, detention ponds, ditches and channels and flows into the Pirita river. The aim of the project was to improve the quality of the stormwater that flows into the Pirita river which is a Natura 2000 site and flows into the Baltic Sea. The work included: widening of channel bottom in different segments, creating artificial dykes and rapids and creating suitable conditions for the aquatic plants exhibited in Botanic Garden (ref 1). With the project, 200m of the channel was reconstructed (ref. 5).

The medieval style Shared Garden Of Sainte-Madeleine Place development - situated in between two nearby schools - in 2009 was quickly claimed by the Association des Habitants Bourse Austerlitz Krutenau (Association of Inhabitants Bourse-Austerlitz-Krutenau) (AHBAK) neighborhood association because of its historic environment. The project turned the space into a shared garden, involving a collective composting area for organic waste, installing a rainwater recuperator, and planting local plant and vegetable species and new trees (Ref. 1, 2, 3).

This NBS is a part of the "Horta à Porta" (allotments at the door) programme which enhances the economic, environmental and social dynamics of the Porto region through the creation of community organic gardens and the promotion of active involvement which empowers local people and institutions. The program is led by the Greater Porto Metropolitan Waste Management Service, LIPOR. Implementation of vegetable gardens began in 2003. In the Metropolitan Region of Porto, there are 23 of these community gardens totalling four hectares, and the forecast is for a large-scale increase in the near future(1)

The project resulted in new greenery (shrubs and various types of vines) at acoustic screens on two busy streets (Grota-Roweckiego and Bobrzyńskiego) in Kraków. It used over a dozen species of ivy, vines and shrubs, which would lushly cover the screens, absorb the dust and help to fight city smog in a span of a few years. The initiative was implemented with the help of the citizens – residents and employees of surrounding companies, who planted the greenery under the experts' supervision [1,2].
The pilot project was implemented in 2016, whereas the main project is still ongoing with an aim to cover more screens across the city [1,3].

From 2009 to 2018, a green wall including 1,700 mediterranean perennials (agapanthus, valerian, fern) fed by a water-saving watering system was in place in a heavily frequented part of Marseille (Ref. 3, slide 4). JC Decaux Advertising offered the 70 m² of space for advertising display around the green wall. The project was abandoned in 2018 when the vegetation was completely removed to allow for advertisements to take up the entire surface of the wall (Ref. 1).