Milano, Italy
City population: 3063361
Duration: 2006 – ongoing
Implementation status: Ongoing
Scale: Meso-scale: Regional, metropolitan and urban level
Project area: 30000000 m2
Type of area: Natural Heritage Area/Untouched nature, Public Greenspace Area
Last updated: October 2021

This is a pilot project part of the strategic plan "Città di Città" in the Milano province, launched in 2006 by the Direzione Centrale Risorse Ambientali, by the Parco Agricolo Sud Milano and by the Multiplicity.lab of the Politecnico di Milano. The project consists in the realisation of a green ring surrounding the city for an extension of 30.000 hectares (15% of the metropolitan area). The ring will connect a series of green areas already existing in the city. The project will insert a total of 3 million new trees along different areas of the city (2). The "metrobosco" is described as: a green belt made up of new forests, parks and rows that extend along the borders of the capital of Milan. A continuous ring of trees and small and large clearings to meet farms, abbeys, watercourses, agricultural areas and spaces for recreation and sports. The project arises from the need to redefine the relationship between city and country, to intensify plant and animal biodiversity, the preservation of existing and the construction of new "ecological corridors", the mitigation of climate imbalances, the abatement of noise and atmospheric pollution, the care and maintenance of the territory and the production of sources for agro-energies (4).

https://www.stefanoboeriarchitetti.net/project/metrobosco-3/

Overview

Nature-based solution

  • Parks and urban forests
  • Large urban parks or forests
  • Green corridors and green belts
  • Other

Key challenges

  • Climate action for adaptation, resilience and mitigation (SDG 13)
  • Climate change mitigation
  • Green space, habitats and biodiversity (SDG 15)
  • Green space creation and/or management
  • Environmental quality
  • Air quality improvement
  • Social justice, cohesion and equity (SDG 10)
  • Environmental and climate justice
  • Health and well-being (SDG 3)
  • Enabling opportunities for physical activity
  • Improving physical health
  • Creation of opportunities for recreation

Focus

Creation of new green areas

Project objectives

The goals include the planting of 3.000.000 new trees covering an area of 30.000 hectares (representatives of local municipalities declared that the idea is to plant 1 tree for each new purchased car in order to offset CO2 emissions) (5). In the first years of the project a total of 6 tons of CO2 per hectare have been absorbed. Private companies are contributing by financing the project to offset their own emissions, such as the car renting company Arval, which has committed to a total of 6.000 that will absorb more than 33 tons of CO2 annually, equivalent to 5.7% of emissions of its internal fleet (7).

Implementation activities

After the end of the designing phase and the agreement between the different municipalities and private companies willing to participate in the project, the NBS includes the gradual planting of a different series of trees in specific geographic areas, with the goal to build a green ring around the city of Milan blocking CO2, dust and other kinds of emissions. Several schools have been involved in the initiative and large number of trees have been already planted. Trees have been selected depending on the area of intervention and their functionality (1, 5 and 7).

Climate-focused activities

Climate change mitigation:

  • Increase green urban nature for carbon storage (wetlands, tree cover)

Main beneficiaries

  • Local government/Municipality
  • Private sector/Corporate/Company
  • Citizens or community groups
  • Young people and children

Governance

Management set-up

  • Co-governance with government and non-government actors

Type of initiating organisation

  • Local government/municipality

Participatory approaches/ community involvement

  • Crowd-sourcing/Crowd-funding/Participatory budget
  • Dissemination of information and education
  • Joint implementation (e.g. tree planting)

Details on the roles of the organisations involved in the project

Boeri Architetti Studio: like in the case of the Bosco Verticale NBS, the studio has been selected for the designing of the NBS (2). The politecnico di Milano is involved in the research on the project as well (4). Schools were involved to educate children about the importance of trees for carbon sequestration and on specific dates they planted trees to start the gradual construction of the Metrobosco (5).

Project implemented in response to ...

... an EU policy or strategy? Unknown
... a national policy or strategy? Yes (The project was launched in response to Italy's effort in implementing the Kyoto Protocol's requirements for air quality improvement (3). )
... a local policy or strategy? Unknown

Financing

Total cost

More than €4,000,000

Source(s) of funding

  • EU funds
  • Public local authority budget
  • Corporate investment
  • Funds provided by non-governmental organization (NGO)

Type of funding

  • Earmarked public budget
  • Direct funding (grants, subsidies, or self-financed projects by private entities)

Non-financial contribution

Type of non-financial contribution
  • Provision of land
  • Provision of labour
Who provided the non-financial contribution?
  • Public authorities (e.g. land, utility services)
  • Citizens (e.g. volunteering)

Impacts and Monitoring

Environmental impacts

  • Climate change
  • Enhanced carbon sequestration
  • Environmental quality
  • Improved air quality
  • Green space and habitat
  • Increased green space area

Economic impacts

  • Reduce financial cost for urban management

Socio-cultural impacts

  • Social justice and cohesion
  • Increased opportunities for social interaction
  • Increased involvement of locals in the management of green spaces
  • Health and wellbeing
  • Improved physical health
  • Education
  • Increased support for education and scientific research
  • Increased knowledge of locals about local nature
  • Increased awareness of NBS and their benefits

Type of reported impacts

Expected impacts

Presence of formal monitoring system

Unknown

Presence of indicators used in reporting

No evidence in public records

Presence of monitoring/ evaluation reports

No evidence in public records

Availability of a web-based monitoring tool

No evidence in public records

References

https://www.stefanoboeriarchitetti.net/project/metrobosco-3/
https://www.stefanoboeriarchitetti.net/project/metrobosco-3/
https://www.stefanoboeriarchitetti.net/project/metrobosco-3/