1. General information
Location and description of the intervention
City or FUA
Bologna
Region
Europe
Native title of the NBS intervention
GAIA - Green Area Inner-city Agreement to finance tree planting in Bologna
Short description of the intervention
The project aimed to tackle two environmental problems through an integrated policy: climate change (both the mitigation and adaptation effects of urban forestation) and air quality. The project foresaw the dissemination of public-private partnership tools, developed within the framework of corporate social responsibility experiences, and the distribution of specific guidelines. Specifically, the project planned to develop a public-private partnership model for urban forestation through the adoption of the ‘green areas inner-city agreement’ (GAIA). This was expected to include three specific protocols for green urban areas covering management, monitoring and mapping resulting in 3000 trees planted across Bologna (1).
Address

Entire city
40100 Bologna
Italy

Type of area before implementation of the NBS
Timeline of intervention
Start date of the intervention (planning process)
2010
Start date of intervention (implementation process)
2012
End date of the intervention
2013
Present stage of the intervention
Please specify "other" stage of the intervention
Seems like they are actually still collecting funds to plant additional trees until 2018 (3).
Goals of the intervention
The three protocols aimed to:
- Develop a model of environmental governance that merges the mitigation and adaptation effects of climate change (and show how they impact on air quality);
- Demonstrate the feasibility of local policies tackling climate change through the development partnerships between private and public bodies for the management of green urban areas;
- Initiate a process for assisting public administrations in promoting co-responsibility by introducing an innovative management tool that fosters tree planting in urban areas to compensate for the construction of infrastructure;
- Define a common and replicable methodology for calculating the greenhouse gases and air pollutants sequestration;
- Offer an instrument that local businesses can apply to offset their carbon footprint (1).
Quantitative targets
The planting of 3.000 new trees (an increase of circa 10%) throughout the city of Bologna with the aim to reduce the concentration of greenhouse gases in the atmosphere by 9.000 tons (1 tree = 3 tons of CO2), improve air quality and renovate the urban landscape (1).
Monitoring indicators defined
The indicators defined for this project are the number of new trees planted and the amount od CO2 sequestered from the atmosphere.

The project includes a study through which the shading capacity per tree was assessed. It also established the potential evapotranspiration values of tree species to ensure that a decrease of the urban heat island effect could be realised. These values have been published in a technical guidebook as part of the project (1 and 3).
Climate change adaptation: What were the goals of the NBS?
Climate change adaptation: What activities are implemented to realize the conservation goals and targets?
Climate change mitigation: What were the goals of the NBS?
Implementation activities
The GAIA project has developed an instrument by which local enterprises and firms can decrease their carbon footprint and, at the same time, generate environmental and social benefits for the community. Even though it was difficult to engage the private sector in these kind of initiatives, mainly due to the economic crisis, the project succeeded in persuading 18 private companies to participate and the planting of 1.000 new trees. It also succeeded in drawing up the foreseen protocols: a technical protocol for evaluating trees in terms of CO2 sequestration and air pollutant removal as well as an analysis of eco-physiological threats of 20 tree species; and a management protocol for identifying juridical characteristics of the private-public agreement. Moreover, the project designed a carbon toolkit for calculating environmental targets in terms of CO2. Finally, it carried out a survey of the best national and international practices in the field of public-private partnership (3).
Type of NBS project
NBS domain and interventions
Ecological domain(s) where the NBS intervention(s) is/are implemented
Grey infrastructure featuring greens
Alley or street trees and other street vegetation
Green playgrounds and school grounds
Institutional green space
Green parking lots
Riverbank/Lakeside greens
Parks and urban forests
Pocket parks/neighbourhood green spaces
Vegetation Type
Please specify how many trees were planted
1.321 trees planted
Amenities offered by the NBS
Services
Expected ecosystem services delivered
Regulating services
Local climate regulation (temperature reduction)
Air quality regulation
Carbon storage/sequestration
Cultural services
Aesthetic appreciation
Recreation
Mental and physical health and wellbeing
Scale
Spatial scale
Meso-scale: Regional, metropolitan and urban level
Beneficiaries
Governance
Governance arrangements
Non-government actors
Coalition with multiple of the above
Please specify the roles of the specific government and non-government actor groups involved in the initiative
IBIMET-CNR, Italy Cittalia-Fondazione Anci Ricerche, Italy Impronta Etica, Italy Unindustria Bologna, Italy. Generally companies' roles involved in the realization of new green areas in order to offset their carbon emissions, while building better ties with local communities and the surrounding environment (1).
Key actors - initiating organization
Key actors - Other stakeholders involved (besides initiating actors)
EU body
Local government/municipality
Business association or network
Private sector/corporate actor/company
Researchers/university
Please specify other participatory methods
There was no active involvement of communities, but only partnerships between municipality and private companies. The interested companies voluntarily pledged to contribute to creating green areas, thus balancing the emissions resulting from some of their activities or selected products. GPG played a very important role contributing actively to the definition of the technical annexes of the GAIA project and to the implementation of the first three pilot interventions (Villa Angeletti park, courtyard of Palazzo d'Accursio and part of the industrial area “Le Roveri”) (1, 3 and 10).
Participatory methods/forms of community involvement used
Policy drivers
NBS intervention implemented in response to an Regional Directive/Strategy
Yes
Please specify the "Regional Directive/Strategy"
It was a result of the principles and targets set by the Kyoto Protocol and United Nations Framework Convention on Climate Change (1).
NBS intervention implemented in response to a national regulations/strategy/plan
Unknown
NBS intervention implemented in response to a local regulation/strategy/plan
Unknown
Mandatory or voluntary intervention
Voluntary (spontaneous)
Enablers
Presence of specific city-level GI/NBS vision/strategy/plan - mentioned in connection to the project
Yes
Please specify
The city of Bologna has been implementing several projects based on GI and NBS. This project was part of the LIFE project and received EU funding covering at least 60% of it (1).
Presence of specific city-level GI/NBS section/part in a more general plan - mentioned in connection to the project
No
Please specify the general plan with GI/NBS section
The city shows a clear aim at applying GI and NBS to tackle urban environmental problems.
If there is a relevant strategy or plan, please specify the theme / type of the plan.
Presence of city network or regional partnerships focused on NBS - mentioned in connection to the project
Yes
Please specify
The partnership between the Municipality of Bologna and several local private industries. The goal is to expand it to other Italian cities (1 and 3).
Presence of GI / NBS research project - mentioned in connection to the project
Yes
Please specify
Yes, the project is part of the EU LIFE Project (1).
Subsidies/investment for GI / NBS in the city - mentioned in connection to the project
Yes
Please specify
The EU financed 60% of the project as part of the LIFE project (1).
Co-finance for NBS
Yes
Co-financing governance arrangements
Unknown
Was this co-governance arrangement already in place, or was it set up specifically for this NBS?
Financing
What is/was the Cost/Budget (EUR) of the NBS or green infrastructure elements?
1.202.000,00 EUR
What are the total amount of expected annual maintenance costs?
Unknown
What is the expected annual maintenance costs of the NBS or GI elements?
Unknown
Please specify cost savings
Unknown
Please specify total cost (EUR)
1,202,000.00 € (1) - of which 600,000 EUR the EU
Source(s) of funding
Non-financial contribution
No
Which of the involved actors was motivated by this model?
Type of innovation
Please specify social innovation
It aims at educating private companies and assisting them in tackling their emissions, while building relationships with public bodies and local communities (3, 4, 5 and 6).
Novelty level of the innovation
Please specify novelty level of the innovation
Unknown
Replicability/Transferability
Please specify Replicability/Transferability
In the long term, more effective urban city planning is expected. GAIA also enhanced the role of local authorities as key actors responsible for the implementation of actions that can mitigate the impact of climate change on the urban environment. The involvement of local companies in the partnership is also expected to increase their sense of responsibility for their surroundings. The GAIA partnership will continue after the project in order to ensure that urban forestation becomes a long-term goal of the municipality of Bologna. It will also help expand activities to other towns in Italy and beyond.

The official page presents instructions on how to replicate the project in other cities. The “GAIA for the cities” and “GAIA for the companies” Guidelines, the technical protocols and the widget toolkits for calculating the CO2 are also available (1).
Impacts, benefits
Description of environmental benefits
As a result of the project, 1.321 trees were planted and 3.963 tons of CO2 was absorbed (data updated in March 2015), and 24 areas (among public urban parks, hillside parks and heritage areas) were selected for planting the trees. Among the selection criteria of these areas, there are the environmental and social valence, as well as the requalification level and the visibility of the areas. These actions, according to sources, led to an improvement in air quality, and also the high number of trees planted led to an area in the city that is an oasis of green with lower temperatures, however, the degrees were not specified (3, 5, 10)
The creation of an online database of the identified 24 tree species that were planted. The selection of the species to be planted was carried out by analyzing the eco-physiological characteristics of the plants such as CO2 absorption, the potential capacity to capture particulates, removal of gaseous pollutants, VOC (Volatile Organic Compounds) emissions and ozone-forming potential (10).
Development of a carbon footprint calculation toolkit (10).
Economic impacts
Description of economic benefits
Unknown
Description of social and cultural benefits
On 19th April 2013, the results of the project and its future prospects were presented at the Final Conference of GAIA. Two important aspects were the presentation of the Guidelines for the replicability of the project – with two specific versions for the Cities and the Companies – and the will of the Municipality of Bologna, confirmed by the Deputy Mayor for Environment Patrizia Gabellini, to turn GAIA into an instrument of the municipal administration. (5)
In the Layman's report, there are mentioned the impacts of the NBS on the community and they are the following:
-its contribution to the psychological and physical well-being of the public;
-revitalizing the area gave the community an increased sense of value (the municipality encouraged young couples to plant a tree with the occasion of their marriage);
-it raised environmental awareness;
-it improved the health of the citizens by allowing them to exercise, to be physically active and also to interact as a conscious community (the community was consulted when the NBS was implemented);
-the NBS also showed that there can be good communication between taxpayers and authorities ;
The NBS itself was presented in international conferences as a success story (5, 10).

Type of reported impacts
Indicators
According to the project official webpage, so far 1.405 trees have been planted (a little below half the final goal) for a total of 4.215 tons of CO2 removed from the atmosphere. Even though the final date was in 2013, the project aims at still reaching the final 3.000 trees goal. It is still possible to adhere to the project and contribute in tree planting on the official webpage, as the page is still active (3,10)
Analysis of specific impact categories
Job creation: The NBS created ...
Environmental justice: The implementation of the NBS project resulted in ...
Negative impacts: Did the project cause any problems or concerns?
No information was found regarding negative impacts of the project
COVID-19 pandemic
Unknown as of July 2020.
Methods of impact monitoring
Methods used to evaluate the impacts of NBS
Evidence for use of assessment
Presence of an assessment, evaluation and/or monitoring process
Yes
Presence of indicators used in reporting
Yes
Presence of monitoring/evaluation reports
Yes
Availability of a web-based monitoring tool
Yes
Impact assessment mechanism
Name of any specific impact assessment tools
Unknown
Use of GIS in mapping impacts
No evidence in public records
Citizen involvement
Citizens involvement in assessment/evaluation
Unknown
Citizens involvement in the analysis of the assessment/evaluation
Unknown
Follow-up to the evaluation / assessment
Unknown
References
List of references
1. European Commission (no date), GAIA - Green Areas Inner-city Agreement "GAIA", Available at https://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=search.dspPage&n_proj_id=3752 (Accessed 19-6-2020)

2. Comune di Bologna (2013), Project Brochure, Available at https://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=LIFE_GAIA_Brochure.pdf (Accessed 19-6-2020)

3. LifeGaia.eu (no date), Gaia una bella impresa, Available at http://www.lifegaia.eu/ (Accessed 19-6-2020)

4. Comune di Bologna et all (2013), After Life Communication Plan: Gaia Project, Available at https://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=LIFE09_ENV_IT_000074_AfterLIFE.pdf (Accessed 19-6-2020)

5. Leyman’s Report (no date), Gaia a wonderful enterprise, Available at https://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=LIFE09_ENV_IT_000074_LAYMAN.pdf (Accessed 19-6-2020)

6. Comune di Bologna et all (no date), Gaia in pillole (project’s presentation), Available at https://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=GAIA_Presentazione_Diapositive.pdf (Accessed 19-6-2020)

7. Comune di Bologna et all (no date), GAIA -Green Area Inner city Agreement, Available at https://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=GAIA_Standard_Presentation.pdf (Accessed 19-6-2020)

8. European Environment Agency (2017), Report: Financing urban adaptation to climate change, Available at https://www.eea.europa.eu/publications/financing-urban-adaptation-to-climate-change (Accessed 19-6-2020)

9. European Climate Change Adaptation (no date), Case study:
GAIA - Green Area Inner-city Agreement to finance tree planting in Bologna (2016), Available at https://climate-adapt.eea.europa.eu/metadata/case-studies/gaia-green-area-inner-city-agreement-to-finance-tree-planting-in-bologna (Accessed 19-6-2020)

10. Piattforma delle Conoscenze (2017), Gaia - Green Areas Inner-city Agreement "GAIA”, Available at http://www.pdc.minambiente.it/it/node/1183, (Accessed 10-7-2020)
Interview comments
No interviews were conducted, but I found the following contacts to dig deeper, since it seems like the project will be extended.

Generic email (public relations office Bologna): URP@comune.bologna.it

Questions regarding GAIA project
Raffaella Gueze
City of Bologna
Environment and Energy Department
Tel.: +390512194743
E-mail: raffaella.gueze@comune.bologna.it

Questions regarding the tree specifications and scientific study
Rita Baraldi
Biometeorology Institute CNR
E-mail: r.baraldi@ibimet.cnr.it
Comments and notes
Additional insights
Because of the efficacy of the project and the good results obtained, the Municipality of Bologna has
decided to carry on with the activities linked to the GAIA project: this will be possible thanks to the
approval of the Executive Committee act (Delibera di Giunta PG.147297/2013), expecting the GAIA
project to become a fully fledged and permanent instrument of the administration. This is one of the
most important project results, since proving the project’s significance and efficacy and allowing the
continuation after the EU financing period. In May 2012, the Municipality of Bologna also adopted the General Development Plan 2012-2014,
which is foreseen by the legislation as the document translating the goals foreseen by the Mayor and
the local government during the political mandate into concrete actions. The Plan was integrated and
newly approved by the Council in June 2013, covering the period up to 2016 and adding GAIA and its
urban forestation activities in the section entitled Green System and Soil Protection. The document
also quoted the two meetings held in the context of the Metropolitan conference (where all the
Mayors of the municipalities of the future Metropolitan area are represented), during which GAIA was
introduced, underlining the engagement and the intention of the Municipality to support interested
municipalities in introducing GAIA within their area. GAIA is also one of the projects listed in the SEAP (Sustainable Energy Action Plan), adopted in May
2012, following the adhesion of the city to the Covenant of Mayors, thus recognising the important
role of the project in reaching the goals foreseen by the Plan.
From this point of view, one of the most important activities will be to get other companies in the area
of Bologna on board and to give visibility to the companies which are already participating in the
project. The instruments used to achieve this purpose will be the website www.lifegaia.eu – where one
can quickly and easily join GAIA – and a guide for the companies called “GAIA a nice enterprise”
including the summary of the project, the obtained results, the project instruments and the conditions
for joining GAIA.

Three orders of problems had to be solved: the identification of spaces for tree planting within the densely built-up
urban area, the definition of legal terms for the public–private partnership and the identification of suitable tree species,
which are sufficiently resilient with respect to future climate conditions (not requiring irrigation and resistant to high
and low temperatures) and have a low allergenic potential. Scientific research developed by one of the project partners
tackled the latter problem and led to new recommendations for the choice of plant species being introduced into the
municipal byelaw for urban green areas.

Nevertheless, looking at the European Climate Adaptation Platform, it seems like the project has been extended in light of the LIFE+ project BLUE AP (Bologna Local Urban Environment Adaptation Plan for a Resilient City).