Financing Urban Tree Canopies in Sierra Leone

Extending Freetown’s pay-to-grow model through multi-beneficiary contracts and Outcome-Linked Prevention Shares

This case study presents a hypothetical financing extension to Freetown’s existing urban-restoration efforts. It is not affiliated with, endorsed by, or currently proposed to the Freetown City Council, the Government of Sierra Leone, Freetown the Treetown, or any of the programme’s partners. All financial, legal, environmental, and technical arrangements would require local approval and project-specific due diligence.

Executive Summary

Freetown, Sierra Leone, has already developed one of the world’s most innovative urban tree programmes.

Through Freetown the Treetown, residents are paid to plant, maintain, and digitally track trees. Growers receive periodic payments tied to continued monitoring and survival rather than being paid only at planting. Freetown’s Climate Action Plan reports that the programme planted and digitally tracked 560,000 trees during its first two years, restored 578 hectares, and directed approximately 80 percent of the resources mobilized into local communities. Freetown City Council Climate Action Plan

The city’s initial one-million-tree ambition has since developed into a broader target of planting five million trees by 2030, supported by digital monitoring and local green employment. United Nations

This creates a strong foundation for prevention finance. Freetown already possesses several elements that would ordinarily need to be created from scratch:

• A city-led restoration strategy
• Community-based implementation
• Digital tree registration
• Survival monitoring
• Performance-linked grower payments
• Local nurseries and employment
• Experience with tree-related tokens
• Relationships with international development partners

The next hypothetical step would be to finance the long-term performance of selected parts of the urban canopy.

This case study proposes a Freetown Urban Canopy Prevention Facility. The facility would not replace or relabel Freetown the Treetown. It would build on the programme’s existing capabilities by aggregating contracted payments from institutions that benefit when urban trees survive, grow, and produce measurable services.

Potential payers could include:

• Freetown City Council
• Development-finance institutions
• National climate and urban-resilience programmes
• Drainage and public-works authorities
• Schools, clinics, markets, and transit facilities
• Commercial property owners
• Electricity-sector institutions, where measurable cooling benefits exist
• Carbon and environmental markets

The initial facility would focus narrowly on urban street, neighborhood, school, clinic, market, and transit canopy. Mangrove restoration, hillside reforestation, watershed protection, and coastal ecosystems would be financed through separate portfolios because they produce different outcomes and involve different land, hydrological, and carbon risks.

The facility would finance canopy establishment and maintenance over 15 to 25 years. A portion of its junior capital would be issued as Outcome-Linked Prevention Shares, or OLPS.

Each OLPS would provide a transferable claim on designated prevention payments generated by a defined canopy portfolio. Distributions would depend on verified outcomes such as:

• Tree survival
• Canopy growth
• Pedestrian shade
• Reduced heat exposure
• Stormwater interception
• Protection of priority public facilities
• Equitable canopy distribution
• Net carbon storage

OLPS would extend the logic of Freetown’s pay-to-grow model from individual-tree implementation into long-duration infrastructure finance.

The shares would also include a Contingent Carbon Value Right. If a future global, regional, or national greenhouse-gas pricing regime creates new financial value from verified urban-tree removals or other recognized outcomes, a defined portion of the net value would flow through the facility. That contingent right would transfer with the OLPS.

Why Freetown Is Particularly Suitable

Urban tree-finance case studies often assume that a city can identify planting sites, mobilize communities, monitor survival, administer payments, and maintain a reliable tree registry.

Freetown has already demonstrated many of those capabilities.

Freetown City Council’s programme uses digital records and community-based implementation to plant, grow, and track trees. The Council has described canopy monitoring and asset management as part of the programme’s implementation structure. Freetown City Council

The programme’s pay-to-grow design is especially important. According to the city’s Climate Action Plan, participating growers have received mobile-money payments at intervals during the first three to five years, when trees require the most intensive maintenance. Payments are linked to continued tracking and survival.

That approach addresses one of the largest weaknesses in conventional tree-planting programmes: the gap between placing a seedling in the ground and producing a mature canopy.

The proposed facility would not claim that Freetown’s monitoring system already measures every financial outcome needed for OLPS. It would use the existing system as the foundation for a broader performance architecture covering heat, canopy development, runoff, public access, carbon, and equity.

The Defined Urban Canopy Portfolio

Freetown the Treetown encompasses several ecological interventions, including urban planting, hillside restoration, mangroves, and broader landscape protection.

This case study would isolate an urban-canopy subportfolio.

Eligible sites could include:

• Streets and pedestrian corridors
• Public schools
• Clinics and hospitals
• Markets
• Transit stops and terminals
• Dense residential neighborhoods
• Public-housing areas
• Commercial corridors
• Municipal facilities
• Drainage-constrained streets
• Public gathering areas

The project would not treat mangroves, watershed forests, or steep hillside stabilization as interchangeable with street trees. Those interventions could support their own future OLPS series, but they require different baselines, survival models, payment sources, and risk controls.

Illustrative Portfolio Series

Series	Primary intervention
Urban Shade Series	Street and pedestrian canopy in high-heat neighborhoods
Schools and Clinics Series	Shade around education and healthcare facilities
Markets and Transit Series	Canopy around markets, transport stops, and walking routes
Neighborhood Drainage Series	Trees and engineered tree pits in drainage-constrained streets
Commercial Corridor Series	Canopy serving participating businesses and public space

Each series would have its own geographic boundary, environmental baseline, payment contracts, performance targets, and OLPS issuance.

The Structural Financing Problem

The existing programme can pay residents to plant and maintain trees, but long-term canopy performance creates benefits for institutions that may not currently contribute directly to the programme.

Beneficiary	Potential value from urban canopy
Freetown City Council	Cooler public spaces, improved streets, and more resilient urban infrastructure
Public-works and drainage agencies	Reduced runoff entering constrained drainage systems
Schools and healthcare facilities	Cooler grounds, shaded access, and reduced heat exposure
Markets and transit operators	More usable public space and shaded pedestrian access
Electricity-sector institutions	Potentially lower cooling demand in eligible buildings
Commercial property owners	Shade, public-space amenity, and possible building-energy savings
Public-health institutions	Lower exposure to extreme heat and some air pollutants
Development partners	Measurable climate adaptation and community-employment outcomes
Carbon buyers	Verified net carbon removals where legally recognized
Residents	Reduced heat exposure, improved public space, and local employment
National government	Progress toward climate and urban-resilience objectives

These benefits are real, but they do not automatically create cash.

A resident experiencing a cooler walk to a clinic cannot easily be billed for the benefit. An avoided heat-related illness cannot ordinarily be attributed to a single tree. A drainage authority may value lower runoff but still lack a budget mechanism for paying an urban-forestry project.

The purpose of the facility would be to convert selected benefits into contracts without pretending that every social outcome can be monetized.

The Intervention

The Freetown Urban Canopy Prevention Facility would finance the full lifecycle of the selected canopy portfolio.

Eligible costs would include:

• Site identification
• Community consultation
• Soil assessment
• Soil remediation
• Nursery production
• Seedling and tree procurement
• Planting
• Tree guards
• Engineered tree pits
• Water storage and delivery
• Early-stage maintenance
• Pruning
• Pest and disease control
• Replacement
• Public-safety inspections
• Digital tree registration
• Environmental sensors
• Independent verification
• Community stewardship
• Long-term asset management

The facility would extend performance responsibility beyond the initial three-to-five-year establishment period. Mature trees still require protection, inspection, pruning, and replacement planning.

Species and Site Standards

The project would use a locally approved Eligible Urban Tree Standard.

Each planting decision would consider:

• Local climatic suitability
• Rainfall seasonality
• Drought tolerance
• Water requirements
• Root behavior
• Canopy shape
• Growth rate
• Wind resistance
• Storm exposure
• Pest and disease susceptibility
• Invasive potential
• Biogenic volatile organic compound emissions
• Allergenic properties
• Compatibility with roads, buildings, and utilities
• Local biodiversity
• Community preference
• Expected service life

Indigenous species would receive preference where appropriate, but native status alone would not determine eligibility. A locally occurring tree may still be inappropriate beside a road, building, drainage channel, or power line.

The portfolio would diversify species and age classes to reduce the risk that a single pest, disease, or climate event destroys the entire canopy.

Water Management

Freetown has a pronounced rainy season, but young trees may still require watering during dry periods. Water availability and delivery must therefore be incorporated into the financing model.

The project would establish a water budget before planting.

Potential sources could include:

• Captured rainwater
• Appropriately treated non-potable water
• Drainage interception
• Temporary establishment watering
• Storage tanks at institutional sites
• Other locally approved sources

The project would account for:

• Water volume
• Treatment
• Pumping
• Storage
• Transport
• Labor
• Energy
• Dry-season reliability
• Competing community needs

Tree survival should not be achieved through indefinite dependence on expensive or scarce potable water. Species and sites would be selected so that routine irrigation can decline after establishment.

The Prevention Finance Vehicle

The facility could be established as a legally authorized project company, trust, municipal contractual vehicle, or other appropriate structure.

Its responsibilities would include:

• Raising capital
• Contracting with institutional payers
• Financing tree and maintenance services
• Integrating with the existing tree registry
• Operating additional outcome monitoring
• Collecting prevention payments
• Issuing OLPS
• Maintaining reserves
• Servicing debt
• Controlling environmental attributes
• Reporting to investors, government, and communities

The facility would require durable rights to plant, maintain, monitor, and replace trees at each participating site. It would not need to own the underlying public land.

Illustrative Capital Stack

Capital layer	Function
Grants and technical assistance	Portfolio design, baseline studies, legal structuring, and initial sensors
Development-finance first-loss capital	Absorbs early performance, municipal-credit, and programme risk
Outcome-Linked Prevention Shares	Transferable junior claims on contracted prevention payments
Senior local-currency debt	Finances establishment, maintenance, and monitoring
Tree replacement reserve	Funds ordinary mortality and replanting
Drought and catastrophe reserve	Covers defined extreme events
Liquidity reserve	Supports, but does not guarantee, OLPS transfers

Because many project payments would be denominated in Sierra Leonean leones, local-currency debt would be preferable where available. Any foreign-currency financing would require explicit currency-risk allocation.

The Contracted Repayment Base

Layer 1: Municipal Canopy Availability Payments

Freetown City Council could enter a hypothetical Urban Canopy Performance Agreement with the facility, subject to municipal and national legal authority.

The city would make a base payment for maintaining:

• Registered trees at approved sites
• Minimum survival
• Required maintenance
• Public access
• Safety
• Monitoring
• Replacement capacity
• Environmental records

The city’s payment would be reduced if trees die without replacement, required maintenance is not completed, or planting sites become inaccessible.

The contract should not create an undisclosed municipal debt or imply a national sovereign guarantee. Payment commitments would require lawful budgeting, procurement, and public-finance approval.

Given Freetown’s fiscal constraints, the municipal payment should probably not be expected to support the entire facility.

Layer 2: Development-Finance Outcome Purchases

A development-finance institution, climate fund, foundation, or bilateral development partner could serve as an anchor outcome buyer.

Instead of providing only an upfront grant, the institution could commit to purchasing verified outcomes over a defined period.

Eligible outcomes could include:

• Established canopy
• Tree survival
• Heat-vulnerable residents served
• Public facilities shaded
• Local green employment
• Stormwater interception
• Verified net carbon storage
• Performance in underserved neighborhoods

An anchor outcome-purchase commitment or partial credit guarantee could make senior financing possible while the city develops its own long-term payment capacity.

Layer 3: Public-Works and Drainage Payments

Trees and engineered tree pits can intercept rainfall, delay runoff, and improve infiltration where soils and site conditions permit.

A public-works or drainage payer could make performance payments based on:

• Verified canopy area
• Engineered tree-pit storage
• Modeled rainfall interception
• Monitored flow changes
• Soil infiltration
• Continued maintenance
• Reduced loading at selected drainage points

The project should not claim that street trees alone will prevent major flooding or landslides. Those risks may require drainage construction, waste management, slope stabilization, watershed restoration, and land-use controls.

Only the runoff service credibly attributable to the urban-canopy portfolio would support payment.

Layer 4: Schools, Clinics, Markets, and Transit Facilities

Institutional sites could enter service agreements covering:

• Shaded entrances
• Cooler waiting areas
• Shaded walking routes
• Reduced surface and pedestrian heat
• Public-space usability
• Site maintenance
• Local stormwater management
• Building-energy savings where measurable

Development partners could fund payments for public institutions that lack independent budgets.

Layer 5: Commercial Property and District Payments

Participating commercial property owners, markets, business corridors, hotels, and large employers could contribute through:

• Site-service agreements
• District contributions
• Shared electricity savings
• Public-space management contracts
• Long-term canopy sponsorships
• OLPS subscriptions

Commercial contributions would not provide exclusive control over public streets or the right to displace informal vendors.

Layer 6: Electricity-Sector Payments

Canopy may reduce cooling demand where trees effectively shade buildings and occupied public spaces.

However, electricity savings should not be assumed to be a major Freetown repayment source without evidence. Benefits will depend on:

• Electricity access
• Metering
• Air-conditioning ownership
• Building design
• Tree placement
• Shade orientation
• Electricity reliability
• Cooling-demand growth

An electricity institution could begin with a pilot covering metered public or commercial buildings. Payment could then be based on measured and weather-normalized demand reduction.

Unverified future electricity savings would remain outside the senior borrowing base.

Layer 7: Public-Health and Heat-Resilience Payments

Freetown’s canopy could reduce heat exposure around clinics, schools, markets, and transit areas. However, avoided hospital admissions and mortality would be difficult to attribute directly.

A health or resilience payer could instead use observable exposure indicators:

• Reduced hours of extreme pedestrian heat
• Shaded clinic access
• Lower temperatures at healthcare facilities
• Reduced heat around schools and markets
• Residents served in high-vulnerability areas

Broader healthcare savings could be reported as a social benefit without being treated as cash unless an agency enters an enforceable outcome contract.

Layer 8: Carbon and Environmental Revenue

Freetown the Treetown has already explored tree-related token and carbon-market funding. The OLPS structure would need to integrate with existing environmental rights rather than issue competing claims.

Carbon revenue could enter the facility only after confirming:

• Ownership
• Additionality
• Baseline
• Methodology
• Monitoring
• Permanence
• Reversal treatment
• National authorization
• Registry status
• No double counting

Carbon revenue would initially remain subordinate.

How OLPS Differ From Existing Tree Tokens

Freetown’s existing token system has helped connect funding with individual trees and continued monitoring. That innovation should be clearly credited.

The proposed OLPS would be different in economic function.

Existing tree-linked token concept	Proposed OLPS
Associated with planting, growing, or tracking trees	Claim on a portfolio of contracted prevention payments
May support sponsorship or carbon funding	Structured as long-duration project capital
Can be linked to individual trees	Linked to neighborhood or institutional portfolios
Primarily supports implementation	Finances maintenance, monitoring, reserves, and expansion
Environmental or sponsorship instrument	Potential regulated financial instrument
Tree-specific performance	Multi-outcome portfolio performance
May be purchased for impact	Expected to bear financial and project risk
Existing programme mechanism	Hypothetical Arctica financing extension

An OLPS would not replace the digital tree token. The existing tree-level records could provide underlying implementation evidence, while OLPS would aggregate portfolio-level financial rights.

Outcome-Linked Prevention Shares

What the Shares Represent

Each OLPS would provide:

1. A proportional claim on designated prevention-payment cash flows.
2. A variable distribution linked to portfolio outcomes.
3. A contingent claim on future Net Carbon Value.
4. Limited voting or consent rights.
5. The ability to transfer the share to an eligible investor.

An OLPS would not provide:

• Ownership of an individual tree
• Ownership of municipal land
• A guaranteed carbon credit
• Control over public space
• A guaranteed return
• Automatic redemption at par
• A right to make an independent environmental claim
• A guarantee from Sierra Leone’s national government

Portfolio-Level Issuance

The facility could issue separate OLPS series.

Freetown Urban Shade Series

Linked to canopy and heat reduction along streets and pedestrian corridors.

Freetown Schools and Clinics Series

Linked to survival, shade, heat exposure, and access at public facilities.

Freetown Markets and Transit Series

Linked to canopy performance around markets, transport stops, and walking routes.

Freetown Neighborhood Drainage Series

Linked to maintained tree pits, canopy interception, and localized runoff performance.

Separating portfolios would allow investors and outcome buyers to select clearly defined risks. It would also prevent the facility from treating mangroves, hillside forests, and street trees as if they produce identical outcomes.

The Outcome Framework

Tree Survival

Existing digital tree records could support survival verification.

The OLPS system would distinguish:

• Trees planted
• Trees surviving
• Trees replaced
• Replacement-tree survival
• Trees removed
• Trees reaching establishment
• Trees reaching defined canopy milestones

Replacement would restore the physical asset, but it would not erase the history of early mortality from performance reporting.

Canopy Growth

The project would measure:

• Canopy area
• Crown width
• Leaf-area index
• Tree height
• Health
• Geographic continuity
• Shade over priority routes
• Canopy distribution among neighborhoods

Digital tree records could be supplemented with satellite imagery, aerial surveys, field measurements, and other appropriate remote-sensing methods.

Heat Reduction

Satellite surface temperature would not be treated as equivalent to human heat exposure.

The project would use:

• Ground-level air-temperature sensors
• Globe temperature
• Humidity
• Shade coverage
• Time-of-day measurements
• Thermal-comfort indicators
• Matched comparison sites
• Weather normalization
• Pedestrian counts where appropriate

Payment would depend on verified reduction in heat exposure at the places and times residents use the space.

Stormwater Performance

Stormwater outcomes would use:

• Rainfall data
• Canopy-interception modeling
• Tree-pit storage
• Soil infiltration
• Drainage conditions
• Flow monitoring at selected sites
• Maintenance records
• Conservative uncertainty deductions

Major flood and landslide benefits would not be attributed to the urban series unless the intervention and hydrological model demonstrated a causal relationship.

Equity Performance

Freetown’s existing community-payment structure provides a strong basis for measuring local economic participation.

The OLPS framework could measure:

• Canopy delivered in high-vulnerability neighborhoods
• Shade at schools, clinics, markets, and transit routes
• Residents served
• Local employment
• Share of payments reaching community organizations
• Participation of women- and youth-led enterprises
• Continued public access
• Avoidance of displacement
• Protection of informal vendors

A portfolio should not receive a high score merely because total canopy increases in already advantaged areas.

The OLPS Performance Score

An illustrative performance score could be:$$OP{S}_t=w_s{S}_t+w_c{C}_t+w_h{H}_t+w_w{W}_t+w_a{A}_t+w_q{Q}_t$$

where:

• $S_t$ is the survival score.
• $C_t$ is the canopy-growth score.
• $H_t$​ is the heat-reduction score.
• $W_t$ is the stormwater score.
• $A_t$ is the net air-quality score.
• $Q_t$ is the equity and community-benefit score.
• The weights sum to one.

Each OLPS series would use weights appropriate to its purpose. A Neighborhood Drainage Series would weight stormwater performance more heavily than a Schools and Clinics Series.

Minimum survival, maintenance, safety, and public-access standards would operate as gateway conditions.

OLPS Distributions

$$D_{OLPS,t}=B_t+\alpha P_{canopy,t}+\beta P_{heat,t}+\gamma P_{water,t}+\delta P_{institution,t}+ϵNC{V}_t$$

where:

• $B_t$ is the base distribution supported by contracted availability payments.
• $P_{canopy,t}$ is the verified canopy payment.
• $P_{heat,t}$ is the heat-performance payment.
• $P_{water,t}$​ is the stormwater payment.
• $P_{institution,t}$ is the institutional-site payment.
• $NC{V}_t$ is Net Carbon Value.

A base distribution would reduce dependence on distant and uncertain modeled benefits. Variable distributions would preserve a meaningful connection between financial return and canopy performance.

Transferability

OLPS could be transferred among eligible professional and institutional investors through:

• Periodic private auctions
• Bilateral transactions
• An authorized transfer administrator
• A development-finance warehouse facility
• Another locally permitted mechanism

Potential investors could include:

• Development-finance institutions
• African pension and infrastructure funds
• Banks
• Insurance companies
• Climate funds
• Foundations
• Impact investors
• Eligible corporate institutions
• Other approved professional investors

Transferability would allow an investor to exit without terminating the trees’ maintenance contracts or refinancing the entire facility.

Limited Exposure-Linked Overlay

The shares would primarily be outcome-linked, but certain contracts could contain exposure-linked transfer provisions.

For example:

• A commercial property’s OLPS could be offered to a new owner.
• A facility operator’s position could transfer to a successor operator.
• A development partner ending its participation could sell to another eligible investor.
• A service provider could transfer its investment after completing its contract.

The underlying OLPS would remain tied to verified portfolio outcomes.

Liquidity Limits

An OLPS investor might still have to:

• Retain the shares
• Sell at a discount
• Wait for a scheduled auction
• Transfer to a warehouse investor
• Use a capped liquidity facility

The facility should not promise redemption at par.

Air Quality and Ground-Level Ozone

Urban trees can intercept some particles, absorb certain gaseous pollutants, suppress dust, provide shade, and reduce heat. Lower temperatures and reduced electricity demand can sometimes reduce conditions contributing to ground-level ozone formation.

The net effect depends on species and local atmospheric chemistry.

Some trees emit biogenic volatile organic compounds. These compounds can contribute to ozone formation in the presence of nitrogen oxides and sunlight. Species, temperature, traffic emissions, canopy density, and street ventilation therefore matter.

The facility would require:

• Low-BVOC species where ozone is a concern
• Local emissions inventories
• Representative air-quality monitoring
• Appropriate street ventilation
• Pollutant and allergen assessment
• Conservative benefit claims

Ground-level ozone is a greenhouse gas, but the project would not claim a greenhouse-gas benefit from lower ozone unless a recognized methodology and applicable legal regime expressly allowed it.

Carbon Measurement

Baseline

The baseline would include:

• Existing trees
• Expected growth without the facility
• Existing municipal planting commitments
• Existing donor-funded activity
• Legal planting requirements
• Normal mortality
• Land-use change
• Expected removals

The facility would not claim as additional trees already funded or legally required under the existing programme unless it finances clearly additional maintenance, survival, or expansion.

Net Carbon Removal

$$NC{R}_t=C{S}_t-E_{nursery,t}-E_{transport,t}-E_{planting,t}-E_{water,t}-E_{maintenance,t}-E_{replacement,t}-R_t-U_t$$

where:

• $C{S}_t$​ is verified carbon stored.
• The emissions terms cover nursery operations, transport, planting, watering, maintenance, and replacement.
• $R_t$ is realized reversal or mortality loss.
• $U_t$ is the uncertainty deduction.

The facility would not assign the same fixed carbon quantity to every tree. Storage depends on species, age, site, health, and growth.

Permanence

The project would maintain:

• A replacement reserve
• A carbon buffer pool
• Long-term monitoring
• Tree-protection obligations
• Rules for construction-related removal
• Procedures for dead biomass
• Cancellation or replacement of invalid claims
• Obligations surviving OLPS transfer

Future Global Greenhouse-Gas Pricing

The facility would contain a Global Greenhouse-Gas Pricing Adjustment Mechanism.

Qualifying Carbon-Regime Event

A qualifying event would occur if a future global, regional, national, or municipal system creates enforceable financial value from the portfolio’s verified climate performance.

Examples could include:

• Recognition of urban-tree removals
• Internationally transferable carbon units
• National carbon-market eligibility
• A jurisdictional forest or urban-carbon programme
• Electricity-sector value for verified cooling savings
• Public procurement payments for urban cooling
• Recognition of ground-level ozone reductions

A global carbon-price announcement would not be sufficient. The regime must create an actual payment, avoided liability, allowance, credit, or compliance value.

National Authorization

If the project’s carbon outcomes are transferred internationally, the facility would comply with Sierra Leone’s applicable carbon-market and Paris Agreement authorization requirements.

The national government may retain authority over:

• International transfer
• Corresponding adjustments
• Registry approval
• Carbon ownership
• Taxes or benefit sharing
• Nationally determined contribution accounting

The facility could capture only value it is legally authorized to receive.

Net Carbon Value

$$NC{V}_t=R{R}_t+AC{L}_t+A{V}_t+R{P}_t-T{C}_t-D{V}_t-P{C}_t-B{R}_t$$

where:

• $R{R}_t$​ is net removal revenue.
• $AC{L}_t$ is avoided carbon liability.
• $A{V}_t$ is allowance or compliance value.
• $R{P}_t$ is a regulated performance payment.
• $T{C}_t$​ is tax, registry, verification, and transaction cost.
• $D{V}_t$ is value already paid or claimed elsewhere.
• $P{C}_t$ is value already passed through to another party.
• $B{R}_t$ is the required buffer or reversal reserve.

Only net, realized, and nonduplicative value would enter the facility.

Contingent Carbon Value Right

Each OLPS would contain a Contingent Carbon Value Right.

A designated portion of Net Carbon Value would enter the Prevention Payment Account. After operating expenses, maintenance, senior debt, replacement obligations, and carbon-buffer requirements, the OLPS allocation would be distributed to current holders.

When an OLPS is transferred, the contingent right would transfer with it as of settlement.

No Double Counting

The central registry would prevent the same outcome from being:

• Sold through an existing tree token
• Sold as a carbon credit
• Claimed by Freetown City Council
• Used by the national government
• Transferred to a development partner
• Claimed by a corporate sponsor
• Monetized under a future global regime
• Independently claimed by an OLPS investor

OLPS would provide financial rights. Environmental claiming rights would remain separately governed.

Change-in-Law Reopener

Contracts would reopen if a future carbon regime:

• Changes carbon ownership
• Changes additionality
• Requires a longer permanence period
• Creates national authorization requirements
• Requires corresponding adjustments
• Changes the applicable methodology
• Recognizes or excludes urban forestry
• Assigns value to another institution
• Prohibits private transfer
• Changes the treatment of existing tokens

Contracts can allocate legally realizable value. They cannot override future Sierra Leonean or international law.

Community Governance

Community participation is central to Freetown’s existing model and should remain central to the financing structure.

The facility would establish:

• Community consultation before planting
• Public mapping of sites
• Local nursery contracts
• Local maintenance employment
• Mobile-money payment where appropriate
• Public performance reporting
• Grievance procedures
• Protection of informal vendors
• Public-access requirements
• Anti-displacement monitoring
• Community representation in project governance

Investor ownership of OLPS would not provide control over municipal streets, public land, markets, or community space.

Principal Contracts

Freetown Urban Canopy Performance Agreement

Between the authorized municipal entity and facility, covering:

• Sites
• Land access
• Availability payments
• Outcome payments
• Public access
• Maintenance
• Tree protection
• Budget authority
• Termination
• Environmental attributes

Development Outcome Purchase Agreement

Covering:

• Verified outcomes
• Payment periods
• Independent verification
• Credit support
• Local employment
• Equity requirements
• Termination

Urban Forestry Services Agreement

Covering:

• Nursery standards
• Planting
• Digital registration
• Maintenance
• Survival
• Replacement
• Local employment
• Performance security

Institutional Site Agreements

Covering schools, clinics, markets, transit areas, and participating properties.

Independent Verification Agreement

Covering:

• Canopy
• Survival
• Heat
• Stormwater
• Air quality
• Carbon
• Equity
• Data integrity

OLPS Instrument and Transfer Rules

Covering:

• Portfolio series
• Distribution rights
• Performance adjustment
• Carbon contingent-value rights
• Investor eligibility
• Transfers
• Auctions
• Voting
• Liquidity
• Wind-down

Payment Waterfall

Project revenue would enter a controlled Prevention Payment Account.

An illustrative waterfall would be:

1. Taxes and essential administration
2. Tree watering, maintenance, and safety
3. Required tree replacement
4. Monitoring and verification
5. Senior debt service
6. Debt-service reserve replenishment
7. Drought and catastrophe reserve
8. OLPS base distribution
9. OLPS outcome-linked distribution
10. Subordinated capital
11. Community and municipal residual sharing

Tree maintenance and public safety would remain senior to investor distributions.

Legal and Regulatory Considerations

The facility would require Sierra Leonean legal analysis covering:

• Municipal authority
• National-government authority
• Public procurement
• Public debt and budgeting
• Securities regulation
• Collective-investment rules
• Land and tree rights
• Carbon-market regulation
• Tax
• Foreign exchange
• Data protection
• Mobile-money payments
• Foreign investment
• Environmental approvals

OLPS might be classified as shares, trust interests, contractual participation rights, fund interests, or another regulated instrument.

The initial issuance should be limited to eligible professional and institutional investors unless applicable law expressly authorizes a broader offering.

An offshore structure should not be used to conceal municipal debt, evade public accounting, or bypass domestic law.

Principal Risks

Risk	Mitigation
High mortality	Pay-to-grow records, establishment standards, and reserves
Drought	Water budget, suitable species, and drought reserve
Excessive rainfall or storm damage	Species selection and catastrophe reserve
Pests or disease	Species diversification
Maintenance interruption	Long-term service contract and senior payment priority
Municipal credit risk	DFI outcome purchases, guarantees, and reserves
Foreign-exchange risk	Local-currency finance or explicit hedging
Heat benefits overstated	Ground-level sensors and matched controls
Flood benefits overstated	Limited claims and hydrological verification
Carbon reversal	Buffer, replacement, and claim cancellation
Double counting with existing tokens	Integrated registry and attribute rules
OLPS illiquidity	Auctions and capped warehouse support
Public-space exclusion	Community governance and access covenants
Displacement	Equity and anti-displacement safeguards
National carbon authorization withheld	Carbon excluded from base case
Existing programme overlap	Clear additionality and cost allocation

Conditions Precedent

Before financial close, the facility would require:

1. Formal acknowledgment of the existing programme and its intellectual contribution.
2. Clear confirmation that the proposed portfolio is additional.
3. A defined urban-canopy boundary.
4. Secure planting and maintenance rights.
5. Integration with the existing tree registry.
6. Local species and site standards.
7. A long-term water plan.
8. Community consultation.
9. An executed municipal agreement.
10. An anchor development-finance outcome buyer or guarantor.
11. A qualified urban-forestry operator.
12. Independent outcome methodologies.
13. A funded replacement reserve.
14. A funded drought and catastrophe reserve.
15. A legally reviewed OLPS instrument.
16. A transfer administrator.
17. Conservative senior debt sizing without speculative carbon revenue.
18. A future global greenhouse-gas pricing mechanism.

Illustrative Bankability Test

$$PV(M+D+W+I+C_e)\ge K_0+PV(O+H+MRV+DS+R)$$

where:

• $M$ is contracted municipal revenue.
• $D$ is development-finance outcome revenue.
• $W$ is drainage or public-works revenue.
• $I$ is institutional and commercial revenue.
• $C_e$ is existing enforceable carbon revenue.
• $K_0$ is portfolio establishment cost.
• $O$ is operations and maintenance.
• $H$ is horticultural care and water.
• $MRV$ is measurement, reporting, and verification.
• $DS$ is debt service.
• $R$ is required reserve funding.

Uncontracted healthcare savings, generalized property appreciation, hypothetical utility savings, and future global carbon prices would remain outside the minimum test.

Why This Structure Is Different

Freetown has already demonstrated that tree planting can be tied to community payments, digital monitoring, and continued survival.

The proposed facility does not attempt to replace that achievement. It asks whether the verified performance data generated by the programme could support a second layer of financial architecture.

That second layer would aggregate payments from institutions benefiting from an established urban canopy. It would finance maintenance beyond the initial establishment period. It would create reserves for mortality and climate shocks. It would issue transferable claims on contracted outcomes rather than relying entirely on grants, sponsorships, or individual tree tokens.

Arctica Advisory Insight

Freetown does not need another financing proposal that treats trees as unverified planting outputs. It has already developed a pay-to-grow model that links community compensation with survival and digital tracking.

The remaining opportunity is to convert that operational foundation into durable financial infrastructure.

Outcome-Linked Prevention Shares could aggregate the value created by surviving urban trees across municipal services, development-finance outcomes, drainage systems, public institutions, commercial properties, and carbon markets. The shares would receive value only when the defined portfolios continue producing contracted outcomes.

If trees die, distributions decline and replacement reserves respond. If the canopy survives, grows, cools public spaces, intercepts runoff, and stores carbon, investors participate in the resulting prevention payments. If a future global carbon-pricing system creates additional value, the contingent right flows through the same shares.

That would extend Freetown’s pay-to-grow innovation into a pay-for-performance asset capable of supporting long-term canopy maintenance and institutional capital, while preserving the community-based model that made the programme possible.