As heat waves and high temperatures intensify due to climate change and urbanization, the City of Phoenix is exploring how to reintroduce tree shade into urban spaces to create a more equitable, livable environment. In 2014, the city set a goal to shade at least 25% of Phoenix by 2030, known as the Tree and Shade Master Plan. Achieving this ambitious target requires substantial resources and active community participation. A key player in this initiative is Trees Matter, an environmental nonprofit dedicated to helping Phoenix reach its shade goals. Trees Matter not only works to expand and sustain the city’s tree canopy but also aims to foster environmental equity. Among its initiatives, the Trees for Schools program promotes tree planting in schools while educating staff and students about the significance of trees and tree care. Silvestre Herrera Elementary School is one example where the Trees for Schools program has made a direct impact. As part of this program, 30 trees were planted on the school grounds, involving students, staff, and community volunteers in the process. These new trees offer critical environmental benefits, including shade, air purification, dust reduction, food production, and carbon sequestration. Additionally, tree presence has been linked to improved physical and mental health outcomes. Beyond the immediate environmental gains, the project also offers educational value by involving students, staff, and maintenance crews in hands-on learning about tree care and environmental stewardship. This approach ensures that participants are equipped with the knowledge and skills needed to care for the trees long term, reinforcing both sustainability and community resilience. Through these combined efforts, Phoenix is making strides toward a greener, more shaded future—one that benefits not only the environment but also the well-being and health of its residents. (1-5)
Overview
Nature-based solution
- Grey infrastructure featuring greens
- Green playgrounds and school grounds
Key challenges
- Climate action for adaptation, resilience and mitigation (SDG 13)
- Climate change adaptation
- Climate change mitigation
- Environmental quality
- Air quality improvement
- Green space, habitats and biodiversity (SDG 15)
- Green space creation and/or management
- Health and well-being (SDG 3)
- Improving physical health
- Social justice, cohesion and equity (SDG 10)
- Environmental education
- Environmental and climate justice
- Sense of community and community engagement
- Economic development and employment (SDG 8)
- Economic development: service sectors
Principal problems in Functional Urban Area (FUA)
- Climate-Related Hazards
- Heat stress & Extreme temperatures
- Environmental Degradation
- Air pollution
- Land use and Socio-economic change
- Unequal availability and access to public green spaces
- Health, Well-being and Social cohesion
- Physical health harm (from pollution, wildfire, extreme temperature)
- Mental health issues (stress, anxiety)
Key priorities
Focus
Project objectives
Implementation activities
Climate-focused activities
Climate change adaptation:
- Increase urban vegetation cover to reduce urban heat island effect
Climate change mitigation:
- Increase the availability of green urban space for carbon storage (street tree cover)
Specification of climate or environmentally vulnerable communities
Main beneficiaries
- Citizens or community groups
- Young people and children
Governance
Management set-up
- Led by non-government actors
Type of initiating organisation
- Public sector institution
- Non-government organisation/civil society
Participatory approaches/ community involvement
- Co-planning (e.g. stakeholder workshops, focus groups, participatory mapping)
- Dissemination of information and education
- 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
- Corporate investment
Type of funding
- Direct funding (grants, subsidies, or self-financed projects by private entities)
Non-financial contribution
- Provision of land
- Provision of labour
- Provision of expertise
- Public authorities (e.g. land, utility services)
- Citizens (e.g. volunteering)
Impacts and Monitoring
Environmental impacts
- Climate change
- Lowered local temperature
- Expected lowered local temperature
- Enhanced carbon sequestration
- Expected enhanced carbon sequestration
- Environmental quality
- Improved air quality
- Expected improved air quality
- Green space and habitat
- Increased green space area
- Achieved increased green space area
Economic impacts
- Generation of other type of work opportunities (e.g. voluntary, work for rehabilitation)
- Achieved generation of other type of work opportunities (e.g. voluntary, work for rehabilitation)
Socio-cultural impacts
- Social justice and cohesion
- Improved access to urban green space
- Achieved improved access to urban green space
- 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 physical health
- Expected improved physical health
- Education
- Increased support for education and scientific research
- Achieved increased support for education and scientific research

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