In 2020, the European Fund for the Balkans (EFB) launched the Trees of Friendship project, which plants over 400 trees annually across six Western Balkan capitals, known to be some of the most air-polluted cities in Europe (Ref. 5). Tirana has been involved from the start, having planted over 110 trees in locations such as Great Lake Park in 2020 and Farka Park in 2022 (Ref. 1,2). The project is carried out with the support of local municipal and civil society partners, including Tirana's Parks and Recreation Agency and the Environmental Territorial Management Institute, along with activists and volunteers (Ref. 1,2). The initiative was planned in 2019 when the EFB board decided to mitigate its CO2 emissions from business-related flights and enhance local and regional cooperation on air pollution (Ref. 3,4,5). Despite challenges in citizen engagement during the COVID-19 pandemic, the Trees of Friendship project continues to raise awareness about the role of trees in mitigating the impact of air pollution on health and well-being (Ref. 2). Its strong and well-established local and regional partnerships have facilitated the project's implementation in the past and continue to benefit in scaling the project (Ref. 1,5).
Overview
Nature-based solution
- Grey infrastructure featuring greens
- Alley or street trees and other street vegetation
Key challenges
- Climate action for adaptation, resilience and mitigation (SDG 13)
- Climate change mitigation
- Environmental quality
- Air quality improvement
- Health and well-being (SDG 3)
- Improving physical health
- Inclusive and effective governance (SDG 16)
- Inclusive governance
Principal problems in Functional Urban Area (FUA)
- Environmental Degradation
- Air pollution
- Health, Well-being and Social cohesion
- Physical health harm (from pollution, wildfire, extreme temperature)
Key priorities
Focus
Project objectives
Implementation activities
Climate-focused activities
Climate change mitigation:
- Increase the availability of green urban space for carbon storage (street tree cover)
Main beneficiaries
- Citizens or community groups
Governance
Management set-up
- Led by non-government actors
Type of initiating organisation
- Non-government organisation/civil society
- Transnational network
Participatory approaches/ community involvement
- Co-planning (e.g. stakeholder workshops, focus groups, participatory mapping)
- Joint implementation (e.g. tree planting)
Details on the roles of the organisations involved in the project
Project implemented in response to ...
Type of enablers
Financing
Total cost
Source(s) of funding
- Multilateral funds/international funding
- Private Foundation/Trust
Type of funding
- Direct funding (grants, subsidies, or self-financed projects by private entities)
- Donations
Non-financial contribution
- Provision of labour
- Public authorities (e.g. land, utility services)
- Citizens (e.g. volunteering)
Impacts and Monitoring
Environmental impacts
- Climate change
- Enhanced carbon sequestration
- Expected enhanced carbon sequestration
- Environmental quality
- Improved air quality
- Expected improved air quality
- Green space and habitat
- Increased number of species present
- Achieved increased number of species present
Economic impacts
- Unknown
Socio-cultural impacts
- Social justice and cohesion
- Increased involvement of locals in the management of green spaces
- Achieved increased involvement of locals in the management of green spaces
- Health and wellbeing
- Improved prevention of respiratory problems
- Expected improved prevention of respiratory problems
- Education
- Increased awareness of NBS and their benefits
- Expected increased awareness of NBS and their benefits
- Other

Information about this nature-based solution was collected as part of the