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Top 5 Sustainable Bitcoin Mining Companies To Watch Out For

Bitcoin mining has historically been linked to high energy use and environmental concerns. However, some companies are changing this image by using renewable energy, practicing transparency, and following strong governance principles. These miners show that it is possible to grow profits while reducing environmental impact.

Before we get to know the top sustainable bitcoin mining companies to put on your radar, let’s learn why sustainability is crucial in this space.

Why Greener Mining Matters: Bitcoin’s ESG Future

Bitcoin’s method of securing its network uses a lot of electricity. This has drawn criticism because most mining still depends on fossil fuels. And thus, sustainable miners are working to separate Bitcoin growth from carbon emissions.

bitcoin energy use
Source: Digiconomist

As governments and investors seek cleaner energy, companies using renewables can gain. They will enjoy better market access and face fewer regulatory issues.

Sustainable mining also helps communities and local power grids. Some miners locate near renewable power sources where they can take advantage of excess energy and even support grid stability. Clear operations lower environmental and noise issues. This helps build strong ties with local residents.

Moreover, renewable energy often lowers costs, sometimes to less than one or two cents per kilowatt-hour. This reduces the cost to mine each Bitcoin and protects miners from fossil fuel price swings. Since Bitcoin rewards decrease over time, miners with cheap power will stay profitable longer.

In a crowded marketplace, miners that demonstrate a commitment to clean energy can stand out. Certifications and carbon offsets boost their reputation. They also attract investors looking for responsible, future-proof miners. Speaking of, here are the top five  bitcoin mining companies showcasing their sustainable, greener operations. 

1. Gryphon Digital Mining: Carbon-Negative Mining Using Hydroelectric and Flare Gas Power

Gryphon Digital Mining is among the first publicly traded Bitcoin miners focused on being carbon-neutral, and now carbon-negative. In 2023, over 98% of its electricity came from renewable sources, mainly hydroelectric power, reaching 100% early in 2024. This was confirmed through independent audits.

The company got a sustainable Bitcoin certification, showing its dedication to clear environmental goals. Gryphon regularly publishes its full emissions data, providing transparency for investors. It also links executive pay to sustainability achievements, ensuring accountability.

Gryphon’s mining fleet works efficiently and uses about 28.6 joules for each terahash. This setup produces nearly one exahash of computational power every second. In 2024, it produced Bitcoin valued at millions of dollars monthly, maintaining high uptime and low power costs. The acquisition of flare gas-powered mining assets increased capacity. It costs about one cent per kilowatt-hour.

Gryphon projects a pipeline of 500 megawatts in new clean energy projects, including flare gas sites. It recently bought a large industrial property in Alberta to expand. With new leaders, the company plans to hit several exahashes per second soon. They will focus on using sustainable energy sources.

Gryphon bitcoin
Source: Gryphon

ESG, Growth, and Strategy

  • In 2023, GP4BTC received sustainable Bitcoin certification from Energy Web. This was part of a new effort to standardize energy measurement in mining.
  • Plans a 500 MW pipeline of low-cost power projects. This includes flare gas acquisition in Louisiana. It adds 59 PH/s right away at about 1¢/kWh.
  • Recently bought an 850-acre industrial site in Alberta for future growth. This move comes under their new CEO, Steve Gutterman. He previously grew TRADE Financial from $1B to $35B in assets.
  • Planning to expand hash rate toward multiple EH/s by mid‑2020s, supported by clean power sourcing and carbon-negative posture.

2. CleanSpark: Multi-Source Renewable Energy and Community-Focused Mining

CleanSpark shifted from energy services to Bitcoin mining with a strong environmental commitment. Its mining data centers are in New York, Georgia, and Mississippi. They get about 94% of their power from carbon-free sources like nuclear, hydro, wind, and solar.

CleanSpark
Source: CleanSpark

One key partnership is with Coinmint, which operates a large hydro-powered facility in New York. This site reports nearly full uptime and plans to reach 100% renewable power. CleanSpark also emphasizes immersion cooling technology, which extends equipment life by reducing heat and energy use. This reduces electronic waste and lowers overall power demand.

The company talks to local leaders before building new facilities. This way, they can address concerns and show benefits, which helps gain social acceptance.

CleanSpark aims to boost its mining capacity from one exahash per second to two. The company is focused on using clean power for this growth.

The company has deep roots in the energy industry since 1987. This experience helps them manage power costs and join grid programs that reward flexibility in demand. It aims for net-zero emissions of direct and indirect operations by 2027.

Targets, Expansion, and Positioning

  • CleanSpark has energy infrastructure from 1987. This gives it an edge in negotiating demand-response and grid service programs.
  • Through ATL Data Centers and Coinmint, CleanSpark exceeded 470 PH/s earlier in 2022, mining 3,768 BTC (over time) and averaging ~4 BTC/day at peak.
  • It aims for net-zero Scope 1 and 2 emissions by 2027. Also, it plans to increase capacity from about 1 EH/s to 2 EH/s and more. The focus will be on keeping a high clean energy share.

3. TeraWulf: Mining Powered by Nuclear and Hydroelectric Energy at Low Cost

TeraWulf runs two major Bitcoin mining sites in the United States. The Lake Mariner facility in New York mostly uses electricity from hydro and nuclear sources. This means it provides about 91% zero-carbon power. The company owns this big operation that has about 110 megawatts of capacity. Plus, it offers over 3.6 exahashes per second of computing power.

The Nautilus Cryptomine site in Pennsylvania uses nuclear power from the Susquehanna plant. It is partly owned and run with partners. This setup cuts electrical costs to about two cents per kilowatt-hour. This boosts profitability.

After selling its stake in the Nautilus project, TeraWulf reinvested capital into expanding Lake Mariner. The company plans to reach approximately 238 megawatts of total capacity by late 2024. It favors the most energy-efficient mining hardware and aims for 100% clean energy powering its operations.

Terawulf
Source: Terawulf

Performance Metrics and Strategic Growth

  • By mid-2023, TeraWulf had scaled to around 5.5 exahashes per second and 160 megawatts of mining capacity. It maintained a low cost per Bitcoin mined, well below industry averages.
  • In Q2 2024, the company raised its capacity to around 10 exahashes per second. This change led to a 130% year-over-year revenue boost.
  • TeraWulf plans to keep using the best mining hardware, like the Bitmain S19 XP Pro and S19 j Pro, which have around 21.5–29.5 J/TH efficiency. They also aim to expand their zero-carbon power sourcing to 100%.

4. Iris Energy: Scaling 100% Renewable Bitcoin Mining and AI Compute Ventures

Based in Australia, Iris Energy, now known as IREN operates mining sites in Canada, Texas, and Australia. Its energy mix is mostly hydroelectric power. It also includes wind, solar, and renewable energy certificates. This adds up to around 97% renewable power.

Iris Energy locates modular mining facilities in regions with a surplus of clean energy. These sites turn extra renewable electricity into Bitcoin. This helps balance local grids and supports communities.

The company owns its land, data centers, and grid connections. This gives it full control over energy use and mining efficiency.

Although it posted modest losses in fiscal 2025, forecasts predict positive earnings in the near future. Institutional investors show interest, partly due to the company’s clean energy commitment.

Iris also develops AI computing services powered entirely by renewable energy. These high-performance GPU clusters provide additional revenue streams alongside Bitcoin mining.

Metrics, Market Position, and Growth

  • The stock is attracting strong institutional interest with an A+/A‑ ratings from IBD and a top relative strength score of 98.
  • By mid-2025, Iris Energy operated at an estimated 50 exahashes per second and reported strong sales growth (172%).
  • Iris offers AI-driven cloud services, powered by renewable-energy-fed GPU clusters (e.g. NVIDIA H100). This adds a higher-margin revenue layer atop its Bitcoin business.
  • The company aims to reach 20 exahashes per second by 2026. It is also looking into green hydrogen and more renewable energy projects.

5. Bitfarms: Hydroelectric Mining with Expanded High-Performance Computing

Bitfarms operates mining facilities in Québec, Washington State, Argentina, and Paraguay. These sites primarily use hydroelectric energy, allowing for 95 to 99% renewable power consumption.

The company has a complete environmental, health, and safety management system. Its board oversees this system. It has teamed up with recycling groups to handle electronic waste properly. This effort creates verified carbon credits.

In 2023, Bitfarms operated approximately 5 exahashes per second in Argentina and aimed to increase to around 6 exahashes. The company has shifted part of its focus to U.S. sites, which offer favorable energy prices and market conditions. Bitfarms also invests in high-performance computing and AI infrastructure.

However, not all developments have been smooth. In Paraguay, a mining facility created loud noise pollution. This bothered local residents and led to legal complaints. It still relied on extra hydroelectric power. Bitfarms has since taken steps to resolve these issues. This case highlights the need for miners to manage community impacts carefully.

The company has restructured its operations into divisions. One focuses on traditional mining, and the other covers broader computing services.

Performance, Social Dimensions, and Future Roadmap

  • By Jan 2025, the operating hash rate reached ~12.8 EH/s, with a strategic shift toward U.S. facilities to leverage favorable power and market access. 
  • Total energy portfolio exceeded 950 MW, with flexibility across Bitcoin mining and HPC/AI operations.
  • Developing a 120 MW high-performance computing and AI site in Sharon, Pennsylvania, within the PJM grid—seeking to monetize infrastructure across both mining and HPC sectors.
Bitfarms
Source: Bitfarms

Clean Hashes, Clear Conscience: A New Era in Bitcoin Mining

The five companies profiled here—Gryphon Digital Mining, CleanSpark, TeraWulf, Iris Energy, and Bitfarms—illustrate the evolving landscape of sustainable Bitcoin mining. Each company combines renewable power, transparency, and strategic growth with a commitment to environmental responsibility.

Gryphon leads with carbon-negative mining and flare gas utilization. CleanSpark emphasizes multi-source renewables and community engagement. TeraWulf focuses on nuclear and hydro to minimize costs.

Meanwhile, Iris Energy specializes in modular, 100% renewable operations and diversifies into AI computing. And Bitfarms leverages hydroelectric sites and expands into high-performance computing while managing community challenges.

Overall, sustainable bitcoin mining is becoming essential. With rising energy scrutiny, investor demand for climate alignment, and stricter regulations, these firms offer scalable models that align economic growth with ecological responsibility.

The post Top 5 Sustainable Bitcoin Mining Companies To Watch Out For appeared first on Carbon Credits.

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Designing an Insetting Program: A Step-by-Step Playbook for Procurement

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Insetting program design starts with your supplier map. The carbon claim comes much later.

Consider a coffee procurement team that funds a farm intervention before checking its sourcing data. The supplier aggregates coffee lots from several regions. The buyer lacks farm-level traceability. Another purchaser expects to report the same outcome. A more attractive project brochure solves none of these problems.

If the distinction between a value-chain intervention and a purchased credit is still open, read CCC’s Insetting vs Offsetting guide before you set the brief.

Insetting program design begins with the purchasing relationship and works outward. You need to decide 1) where an intervention belongs, 2) what business problem it addresses, 3) who pays for it, 4) how results will be measured, and 5) what the evidence will let you say about them. This five-step playbook turns that sequence into a procurement plan.

Step 1: Insetting program design starts with supplier mapping

Start with the commodities that matter most to your Scope 3 inventory and sourcing continuity. Ask finance for spend by supplier, sustainability for the emissions baseline, and category managers for origin and volume records. Then identify which suppliers can trace material to a jurisdiction, sourcing region, producer group, or individual land-management unit.

The level of traceability affects what you can account for. Under the GHG Protocol Land Sector and Removals Standard, the spatial boundary for purchased land-based products depends on the traceability associated with each volume. Farm-specific factors or removals require physical traceability through an acceptable chain-of-custody model. A contract with a tier-one trader, by itself, does not establish a link to the farms behind its deliveries.[1]

Build a first-pass table with five columns: commodity and annual volume; supplier and origin; current traceability level; land-use and production risks; and the business owner who can change the purchasing terms. Mark missing data plainly. A blank cell is cheaper to fix before a program starts than after a claim is drafted.

If your company sets an SBTi Forest, Land and Agriculture target (FLAG), keep its land-related target boundary separate from energy and industry emissions. The current FLAG guidance also requires relevant companies to assess primary deforestation-linked commodities in their value chains.[2]

Step 2: Choose a commodity and jurisdiction for a pilot

Select one supply corridor where the sourcing connection can be established and procurement has a reason to stay. A useful pilot has repeat purchases, suppliers willing to share records, an intervention matched to a diagnosed problem, and a defined plan to measure the result. Carbon potential alone is a poor selection rule if the supplier cannot deliver the crop your business needs.

Compare candidate regions on land-use risk, supplier concentration, local rights and tenure, the availability of baseline data, and exposure to drought, erosion, or forest conversion. Check the relevant legal requirements separately. A nature project does not satisfy a due-diligence obligation merely because it has a carbon method attached.

Consider a coffee buyer sourcing from two districts. In the first, producer-group records identify the farms, while recent dry seasons have increased rejected green coffee lots. In the second, deliveries pass through several intermediaries and farm origins are unknown. Pilot shade management in the first district, with local agronomic advice and quality checks built into the plan. The buyer can trace purchases there and test the intervention against a defined sourcing problem.

Use a short decision memo to record why the selected corridor beats the alternatives, what remains uncertain, and what would stop the pilot. That memo is the first control against a project drifting toward whatever happens to photograph well.

Step 3: Design the supplier engagement and commercial model

The intervention needs an owner on each side of the contract. Decide who supplies planting material or training, who maintains the practice, who bears the cost if a harvest disappoints, and how long the buyer expects to purchase from participating suppliers. Where smallholders participate, budget cash flow and technical support for practices that offer a later return.

Put these terms in a supplier agreement or pilot addendum. It should cover eligible farms and volumes, consent to data collection, access for monitoring, any land or carbon rights that matter, benefit sharing, and what happens if the purchasing relationship ends. Ask local counsel and producer representatives to review the arrangement. The Accountability Framework is a useful reference for supply-chain work involving forests, ecosystems, and human rights.[3]

Avoid assigning an automatic carbon benefit to the buyer. The contract should say which party has the right to report each outcome, how overlapping claims will be checked, and how any issued credits will be handled. A reduction reported in a buyer’s inventory cannot simply be sold for someone else’s offset claim without an accounting review. SBTi FLAG guidance excludes purchased credits used as offsets from near-term FLAG target achievement.[2]

Set commercial measures beside environmental ones: delivered volume, rejection rate, supplier retention, and procurement cost. They tell you whether the program works as a supply-chain investment, even if carbon accounting takes longer to resolve.

Step 4: Build monitoring, reporting, and verification before rollout

Agree on the baseline and data flow before paying for a full rollout. Identify the land units or sourcing regions in scope, the practices that change, the records suppliers already keep, and the additional measurements the program requires. Decide which data can come from field visits, transaction records, or remote sensing, and who checks each source.

For carbon, separate three questions. Did the practice happen? Did emissions or removals change under an applicable method? Can the buyer attribute a defensible share to its purchased goods without double counting? The GHG Protocol’s 2026 guidance includes dedicated chapters on spatial boundaries, data and methods, evaluating actions, credited outcomes, and assurance.[1] These are distinct jobs. A photograph of a planted tree answers only part of the first.

CCC’s MRV and Additionality article explains the separate evidence questions a project reviewer will ask.

Create an evidence file for every reporting period: dated supplier and farm records, purchase volumes, methods and emission factors, uncertainty, quality checks, and changes from the baseline. Specify who can challenge the data and how corrections are recorded. If a project also seeks credit certification, keep project accounting and corporate inventory accounting separate. The GHG Protocol says its land standard focuses on entity-level inventories and does not set the rules for credit certification.[4]

Start with the minimum viable measurement design that can survive review. Add complexity when the pilot tells you which data actually changes a decision.

Step 5: Decide what can be reported and claimed

Insetting program design needs reporting rules before the marketing copy. Procurement, sustainability, finance, and legal should agree on four distinct outputs: operational performance; observed land or nature outcomes; inventory effects, if the accounting criteria are met; and any separately issued credits. One dashboard can display them, but they should not share a single unqualified headline.

SBTi FLAG guidance allows certain land-based removals within a company’s operations or supply chain to contribute to FLAG pathways, subject to criteria including permanence, traceability, data quality, and allocation. It does not allow purchased offsets to meet near-term FLAG targets.[2] Eligibility therefore depends on evidence and the applicable target rules, not on calling an activity “insetting.”

Draft a claims register. For each proposed sentence, record the period, boundary, data owner, calculation method, reviewer, and whether the result is measured, estimated, or still a goal. If the evidence supports only “we funded a pilot with 200 farms,” say that. Do not turn a funding fact into a verified emissions reduction.

What good looks like by year three

Treat year three as a review point, not a promised payback date. A mature pilot should have mapped participating supply volumes, a stable supplier agreement, a repeatable data collection process, and a comparison of commercial and environmental results against the baseline. It should also have a documented answer for outcomes that cannot be included in the buyer’s inventory.

Scale only where the pilot improves a sourcing decision and the evidence can follow the product. If neither condition holds, redesign the intervention or change the corridor. A disciplined program can conclude that a site is unsuitable. That is useful procurement intelligence.

Discuss your insetting program with CCC

Carbon Credit Capital designs nature-based supply chain investments around sourcing needs and measurable sustainability outcomes. Schedule a consultation with our carbon and sustainability experts to map your tier-one supplier network, FLAG exposure, and first pilot decision.

Sources

[1] GHG Protocol, Land Sector and Removals Standard, version 1.1, and companion Guidance, June 2026: https://ghgprotocol.org/land-sector-and-removals-standard ; https://ghgprotocol.org/land-sector-and-removals-guidance

[2] Science Based Targets initiative, Forest, Land and Agriculture Science-Based Target-Setting Guidance, version 1.2, March 2026, especially pp. 16–17, 37, and 41: https://sciencebasedtargets.org/resources/files/SBTiFLAGGuidance.pdf

[3] Accountability Framework initiative, Accountability Framework and guidance for companies: https://accountability-framework.org/

[4] GHG Protocol, Frequently Asked Questions: Land Sector and Removals Standard, questions 10 and 18: https://ghgprotocol.org/blog/frequently-asked-questions-land-sector-and-removals-lsr-standard

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The Strategic Case for Nature-Based Carbon Investments

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Nature-based carbon investments deserve consideration when they address a specific business dependency and produce outcomes you can measure. Imagine Moonbucks, a global coffee roaster planning next season’s espresso blend. It is considering natural Grade 4 coffee from Jimma, in southwestern Oromia, Ethiopia. Its sourcing decisions affect the roasting schedule and the cash tied up in coffee purchases. Moonbucks needs to understand which measures could protect that supply, what they would cost and how it would judge the results.

1. Define the sourcing problem before choosing a project

Moonbucks needs a dependable component for its espresso blend. Its procurement team wants continuity of volume and an agreed cup profile. Replacing a shipment at short notice could require new sample approval and changes to the blend, and given the schedules for cultivation, processing, and freight delivery, is practically impossible. Moonbucks needs to get this right, and its initial concern is inconsistent deliveries. It commissions an assessment of the supplying farms and post-harvest chain. The questions cover land condition, harvest availability and whether drying or storage problems are affecting saleable lots.

This distinction changes the investment brief. A tree-planting proposal cannot be assumed to fix drying problems. Better storage cannot restore eroded land. The team must establish which problem exists before selecting the response.

CCC’s guide to finding nature-based solutions in your supply chain explains where to look. Here, the next task is to turn a broad concern into a testable proposal.

2. Develop nature-based carbon investments around the actual supply chain

The assessment would trace Moonbucks’ purchases back through the exporter and supplying producer groups. Which farms supply the contracted lots? Who controls land-management decisions? How long does the buyer expect to maintain the purchasing relationship?

Furthermore, Jimma natural Grade 4 cannot be treated as interchangeable with every Ethiopian coffee. Moonbucks would need to test any substitute against its own blend and quality requirements.

Suppose Moonbucks’ assessment identifies an opportunity to maintain shade trees and restore vegetation along exposed streambanks. The IPCC describes agroforestry as a way to store carbon in vegetation and soil, with potential benefits for erosion control and water quality.1 Moonbucks would need local advice on species, growing conditions and maintenance before deciding how these measures fit its sourcing plan.

The proposal now has a defined sourcing connection and a candidate intervention. The next steps are to test its effect on production, assess carbon eligibility and build the financial case.

3. Compare the proposal with other ways to protect supply

WBCSD’s Nature-based Solutions Blueprint recommends comparing nature-based options with other responses across their benefits and costs.2 For Moonbucks, that means evaluating the landscape proposal alongside drying improvements, storage controls and alternative sourcing arrangements.

The product’s natural-process designation matters. Moonbucks should examine the drying and dry-milling chain alongside land conditions. Its team would check storage practices, contamination risks and incoming-lot quality to see whether problems arise before or after the coffee leaves the farms.

The revised proposal might combine land stewardship with separate post-harvest controls. Each component needs its own purpose and budget. A sustainability label should not obscure which activity is expected to solve which problem.

The project develops as the evidence improves. Its scope should follow the diagnosis rather than preserve the first idea unchanged.

4. Establish what the carbon outcome could count toward

Moonbucks’ sustainability team now tests the proposed carbon case separately from the sourcing case. Is the objective a measurable change in Moonbucks’ value-chain emissions, verified credits for separate voluntary use, or distinct outcomes under carefully defined arrangements?

Scope 3 covers value-chain emissions. A purchasing relationship alone does not prove that a farm intervention can be included in Moonbucks’ inventory. The team needs an applicable accounting method, defensible boundaries and evidence supporting attribution.

SBTi’s FLAG Guidance (forest, land and agriculture), version 1.2, says purchased credits used as offsets cannot meet near-term FLAG or energy and industry targets. Eligible land-based removals are subject to accounting requirements.3 Moonbucks needs to test its proposal against those rules before including an outcome in its targets.

For Moonbucks’ Jimma proposal, maintaining existing trees and establishing new vegetation could involve different carbon questions. Specialists must examine the baseline and additionality, meaning what changes because the project proceeds. They must also assess measurement and the risk that stored carbon is lost. CCC’s MRV and additionality article introduces those tests.

Until that work is complete, Moonbucks should not budget an assumed Scope 3 reduction or credit-sale receipt. Direct emissions reductions remain the priority.

5. Build a financial case that survives weaker assumptions

Moonbucks’ finance team would now build a multi-year budget. UNEP’s State of Finance for Nature 2023 compares current finance with the investment needed to meet climate, biodiversity and land-restoration goals.4 The company would cost its proposed activities, farmer participation and ongoing monitoring. Verification, where required, is a separate expense. Maintenance and responsibility for replacing failed plantings must remain visible after the initial establishment budget ends.

Operational benefits need equally careful treatment. If fewer rejected lots reduce emergency purchasing, count that saving once. Do not add “supply resilience” as another financial benefit when it represents the same avoided cost.

Moonbucks should compare a base case with slower benefits, higher implementation costs and no carbon revenue. It should also distinguish production outcomes from quality and shipment outcomes. A single good harvest would not prove that the landscape intervention caused better delivery performance.

A project can remain worth funding even when its carbon case needs more work. That decision must rest on the operational evidence and the company’s objectives, without unsupported environmental claims.

6. Fund a pilot with a clear expansion decision

Moonbucks’ first approval would fund a bounded pilot, rather than commit the entire sourcing program. Before spending, Moonbucks would agree on participating farms, responsibilities and the evidence needed at review.

Its scorecard could track farmer participation, implementation costs and plant survival, alongside accepted coffee volumes and lot-quality results. Carbon measurements would follow the selected method. Farm-level traceability must connect the intervention to the actual sourcing relationship.

Suppose Moonbucks’ review later finds that storage changes explain most quality improvements, while the land measures need longer observation. Those findings would shape the next decision: expand the proven component, adjust the landscape work or pause further spending. They would not justify crediting all improvements to tree planting.

This gives nature-based carbon investments a practical place in a multi-year strategy. Funding increases as the evidence supports it, and the project can change direction before a larger commitment.

Discuss a sourcing opportunity with CCC

Carbon Credit Capital’s nature-based supply-chain investment service uses its Dual-Value Model to examine supply-chain economics alongside potential sustainability outcomes.

Schedule a consultation to discuss your sourcing exposure and the questions to resolve before allocating capital.

Sources

  1. Intergovernmental Panel on Climate Change (IPCC), Climate Change 2022: Mitigation of Climate Change, Chapter 7, Agriculture, Forestry and Other Land Uses, section 7.4.3.3 (Agroforestry).
  2. World Business Council for Sustainable Development (WBCSD), Nature-based Solutions Blueprint, 5 June 2024.
  3. Science Based Targets initiative (SBTi), Forest, Land and Agriculture Science-Based Target-Setting Guidance, version 1.2, March 2026, section 3.1.4, pp. 37–38.
  4. United Nations Environment Programme (UNEP), State of Finance for Nature 2023, 2023.
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How to buy plastic credits, and what to check before you do

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