Blockchain and Environmental Credits: What It Can Record, What It Cannot Measure

How an environmental credit is made

Environmental credits come in several kinds, including carbon, methane and ecological credits, from projects as different as farms, forests and capped oil wells. The steps below follow Iowa State University extension materials and a peer-reviewed farmer-interview study, so they describe farm carbon credits specifically; we did not read the rules for other project types, which use different methods. A credit starts with a practice change, such as cover crops or reduced tillage Confirmed. The change is judged against a baseline, which some programs set from the same field’s past practice and others from common practice in the area Confirmed. It must also be additional: caused by the payment, not something the farmer would have done anyway Confirmed. Many programs read that as meaning the practice was not already in use, which farmers say penalizes early adopters Reported. The benefit is then quantified, either by measurement or by modeled rates for each practice Confirmed. After checking, credits are issued, sold and used by buyers to offset their own emissions or those of their supply chain Confirmed.

Where farmers get stuck

Iowa State’s July 2023 note reports that farmers recently received about $15 to $30 per tonne of carbon dioxide equivalent for offsets and $5 to $15 for supply-chain “insets” Reported. Its worked example, using $24 per tonne and 0.25 tonnes per acre per year, comes to $6 per acre per year, an illustration rather than a market price Reported. A farmer interviewed in a separate study cited roughly $15 per acre as typical Reported (a single interview).

That study, which interviewed 17 farmers between January 2021 and February 2022, found a consistent list of complaints: payments too low to change behavior, heavy record-keeping, payouts that were hard to predict or explain, distrust of the programs, additionality rules that penalize early adopters, and greenwashing concerns Reported. It is a small qualitative sample, not a survey of the industry. A 2018 article in The Counter quoted an expert saying the barrier was the cost of validating and verifying sequestration rather than a lack of measurement technology, and that returns could take 10 to 15 years while transition costs came first Reported. The extension materials also say reversal is a risk, since disasters or a farmer dropping the practice can release stored carbon Confirmed. Some programs hold back a buffer of credits against it Reported.

What a blockchain can and cannot do here

Plausible uses. A ledger can give each credit a unique serial number, show who holds it and record its retirement, which helps prevent the same credit being sold twice. It can also keep a time-stamped record of farm data and trigger payments when conditions in a contract are met. Each of these is a claim by the projects described below, not a result independent reviewers have measured Issuer-stated.

What it cannot do. A ledger records what is entered. It does not tell you whether the soil stored carbon. In The Counter’s 2018 reporting, current methods for authenticating sequestration were described as unreliable and expensive, and the proposed answer involved sensor, satellite and human-observation data collected off the chain before anything was recorded Reported. None of the three university and journal sources we read says that blockchain, remote sensing or any single technology solves measurement. For a ledger’s relationship to payment and ownership records more generally, see tokenization in our glossary.

Three vendor options

These are three approaches in the space, chosen to be different from each other and listed alphabetically. They are not ranked, and we are not recommending any of them. All three describe themselves in their own materials, and we found no independent audit of any of them.

Sources: Hedera DOVU case study (Oct 2025) and DOVU post (Jul 16, 2025); ESG Post (Feb 24, 2026); Environment+Energy Leader (Mar 2, 2026); Grow Ecosystem article on Royal Family Farming methane avoidance credits (Medium, Nov 2026), the Grow Blockchain explorer token and contract pages and the linked registry project page (read Nov 14, 2026), and Grow site; Regen Network about page, Oct 10, 2022 release and Regen Compute page.

DOVU and Hedera Guardian

Hedera describes Guardian as open-source software for digitizing the rules of a carbon program and recording each step of the process on Hedera Issuer-stated. DOVU builds on it Issuer-stated. The two news reports about the soil credits say the validation was done under a soil carbon protocol from a carbon standards body, using soil samples, and name the first farmer to receive credits. The validator, the issuance date, the number of credits and the payments to farmers are not stated Unknown. One report adds the caveat that the revenue model assumes stable pricing and buyer demand and that scaling will test whether sampling can run commercially Reported (the writer’s analysis).

Grow

Grow’s November 2026 article walks through one example, token 52,599, and describes the token page as showing the credit type, allocation, dates, registry IDs, project description, methodology and verification status Issuer-stated. We checked that against the public record on November 14, 2026, reading the token and both contracts on the Grow Blockchain explorer and the registry page the token links to.

What matches. Token 52,599 is an ERC-721 token minted on March 19, 2025 and still held by the wallet that received it. Its metadata describes a worm-based waste treatment system, cites the AMS-III.Y methane avoidance methodology, lists a 2023 date range and an allocation of one tonne of CO2e, says the credits are verified by the registry operator, and links to a registry project Confirmed. That registry project exists. It is in Royal City, Washington, uses a vermicomposting system to separate solids from animal waste, lists the same methodology among its approved ones, was registered in February 2021 and names a validator Confirmed. Linking the registry page from the token is what made this check possible, which is a real advantage of putting the references in public metadata.

What does not line up in the public pages. The main contract holds 52,600 tokens, all in a single wallet, and its metadata states a collection total of 52,788 tonnes. A second contract with the same name holds 42 tokens, was minted in December 2024, is held by its deployer wallet and states a total of 52,679 tonnes. Together the contracts hold 52,642 tokens, which equals neither total Confirmed. The registry lists a different proponent from the farm named on the token, shows 202,074 credits issued over the project’s life, of which 201,886 are retired and 188 active, and its overview page does not show which monitoring period or verifier produced the 2023 credits Confirmed. The 188 active units equal the gap between the main contract’s stated total (52,788) and its supply (52,600), and the pages do not say whether that is related. The tokens do not say which registry serial numbers they mirror, or whether those units were retired, sold or still available Unknown.

That last point is the one that matters for the double-counting question. A token that mirrors units still held at the registry adds a second view of the same tonnes. A token that mirrors units already retired there would record tonnes that have been used. The public pages do not settle which this is. Neither contract’s source code is verified on the explorer, and nothing on the pages shows a sale, transfer or retirement of any token Confirmed. The ledger shows that the tokens exist and where they sit; the registry, not the chain, remains the record of whether a tonne was verified and used. ChainBrief’s earlier report on the wider ecosystem is our article on Grow.

Regen Network

Regen’s own materials say sellers can define, manage, mint and sell tokenized credits and buyers can purchase, transfer and retire them, and that its ledger can store smart contracts and remote-sensing data so payments can be automated Issuer-stated. Measurement is done off-chain before anything is recorded. The materials we read do not give farm-level payment figures.

A different layer: settling credits issued elsewhere

The three options above record or issue environmental credits, mostly from farms. A fourth model, Triangle Digital, sits one step downstream: it says it settles ownership and retirement of credits whose project records live somewhere else. We cover it separately because it answers the question raised above about whether an on-chain token duplicates a registry entry, and because its farm relevance is thin.

What it says it does. Triangle describes itself as financial infrastructure that turns environmental performance into regulated, tradeable digital assets, and says it holds a Class M digital asset business licence from the Bermuda Monetary Authority, with public issuances falling under Bermuda’s digital asset issuance law Issuer-stated (we did not check the regulator’s register); a local newspaper reported the authority’s oversight in August 2025 Reported. Its site says existing registries hold the project record (methodology, verification, monitoring data) and that its own registry is the settlement layer for ownership and retirement Issuer-stated. It describes two paths. In the ledger path, the credit stays at its original registry, frozen in a Triangle account there, while a digital asset mirrors it one for one; retiring the digital asset unfreezes and cancels the original at the source. In the asset path, the credit moves into a Triangle account and converts in full, with project documents attached Issuer-stated.

What that does and does not settle. The ledger path is a direct answer to double counting, because the original is locked while the token exists. Triangle’s carbon page claims “double-counting prevention at source” but describes no mechanism beyond the ledger path, and another page says Triangle-native credits come from its own digital-twin data with third-party verification, which the registry page does not reconcile Unknown. Retirement is described as asserted against an on-chain record, with the credit shown as pending until then Issuer-stated. A Canadian law firm’s February 2025 note makes the general point that bridges lock the registry credit to prevent double counting, and that tokenizing does not change a credit’s underlying characteristics, so each needs its own legal assessment Reported. A blockchain vendor’s explainer says tokenizing a weak credit improves its liquidity, not its quality Issuer-stated (vendor view).

Numbers and status. A September 2026 Triangle release with Terra Nova International, which plugs orphaned oil and gas wells to cut methane, cites more than 9.2 million tonnes of CO2e of assets to come to market. That is a forward figure, and the release names no price or registry Issuer-stated. It said initial issuances were expected in the coming months. An editor’s check of Triangle’s registry reports that Terra Nova credits were issued on October 26, 2026 Reported; Triangle’s news page, which we read on November 15, 2026, carries no issuance announcement, and the registry page we opened is a different project, so we have not matched that date ourselves. A Triangle carbon page claims more than 1.2 million tonnes retired, with no date, breakdown or named buyers, and a third-party software directory reported in July 2026 a partnership with an EV charging provider for a “zero-emission mile” credit Issuer-stated Reported. Triangle’s agriculture page lists soil-health credit minting and farm lending offerings without farm counts, tonnes or prices Issuer-stated. Pricing is not public Reported. Methane avoidance on farms: none documented.

What the registry and the chain show. Individual project pages in Triangle’s registry open without an account. On November 15, 2026 we read a Triangle registry page and its token on Etherscan. The page is a forest-conservation project in the Democratic Republic of the Congo, not Terra Nova. Its token is an ERC-20 token on Ethereum mainnet with a supply of 200,876,559, split on the registry page into 180,788,904 open and 20,087,655 buffer, and the registry’s quantity matches the on-chain supply and token address Confirmed. Retired quantity is zero on both Confirmed. The same page lists 159,876,559 as unissued and describes the project as both forward-looking and already measured, over a 20-year period, so part of that supply is expected volume rather than credits already issued Issuer-stated. The page shows a verifier and a mint date of September 25, 2026, and the explorer lists two holders; neither shows a sale or who the buyers are. We read two registry pages and one token, not the whole registry.

Where Avalanche fits. Triangle’s own marketing and documentation pages say only “on chain”, “smart contract” and a “Multi-Token Network”, and name no blockchain. Its registry does: the token we checked, above, is on Ethereum Confirmed. The one document linking Triangle to Avalanche is an August 2025 joint release with Apierion, a Bermuda health-data company that says its products run on Avalanche. The release quotes Triangle’s chief executive saying health data is validated on Avalanche and then monetized by Triangle Issuer-stated. That describes Apierion’s data layer and Triangle’s role in turning it into carbon-offset value. It does not say Triangle’s carbon assets are recorded on Avalanche, and the one carbon token we checked is on Ethereum. We found no shared ownership between the two companies; each names its own chief executive. We could only read part of that release’s body, so its other chain references are unchecked.

Beyond Triangle, Avalanche is sometimes cited as a home for environmental-credit projects. We found one documented example: an open-source carbon-accounting network from the group opentaps, announced as live on Avalanche mainnet in September 2022 Issuer-stated. The announcement publishes no contract address, and an editor could verify only a test-network version Unknown. The Avalanche institutional-platform commentary and press page we read do not mention carbon or environmental credits, and one Caribbean carbon article we read describes credits on Polygon, not Avalanche Reported. A carbon-tokenization vendor, Xeptagon, lists Avalanche among several chains it can integrate with and names no client on it Issuer-stated. So the claim that Avalanche hosts many environmental-credit participants is not yet supported by sources we could find. Triangle’s carbon tokens are on Ethereum, and we found no Avalanche version of them. If Triangle or Ava Labs publishes a chain, contract or client list that says otherwise, that would be worth adding here.

Market context. Environmental Finance, citing a 2024 market report, put retirements at about 182 million tonnes worth about $535 million, the lowest volume since 2018, at an average price of about $6.34 per tonne Reported. Infrastructure that makes credits easier to settle does not by itself create demand, which is the problem sources attribute to Nori.

A cautionary case: Nori

Nori ran a marketplace for farm carbon removal and shut down in 2024, according to GeekWire and AgNavigator Reported. GeekWire quoted a former co-founder relaying an email from the chief executive that blamed a stagnant voluntary carbon market and a tough funding environment, and reported that the company had raised $17.25 million Reported. Early coverage in 2018 described a plan to use a blockchain to show buyers that credits were retired and not resold Reported. AgNavigator attributed the failure to uncertainty about how to quantify and credit carbon removal Reported (outlet analysis). The lesson in the sources is that demand and measurement, not record-keeping, were the bottleneck. Nori’s smart-contract code is still public on GitHub, and an editor reported its contracts remain on Ethereum and Polygon after the shutdown. The README we read describes Ethereum contracts and names only test networks, and we did not open its deployment records, so we have not confirmed the mainnet deployments Unknown. A closed company can leave a ledger behind; the ledger does not keep the business running.

Where blockchain was needed, and where it was not

Needed or useful: unique serial numbers, a public retirement record and a shared audit trail can help when credits move between several parties and double counting is a concern. That is the use all three vendors describe, and Grow’s article makes the same claim for its methane credits Issuer-stated. The benefit depends on whether the ledger is the system of record or a copy of credits issued elsewhere, which the Grow token pages and the registry page we read do not settle. Not needed: a single registry operator can also keep these records in a conventional database, and the sources we read do not show a measured advantage for a blockchain over that Unknown. Not enough: measuring the carbon, setting a fair baseline, deciding additionality, paying farmers more and creating buyer demand are not ledger problems. The farmers in the interview study asked for higher, clearer payments and less paperwork, and one noted that a developer’s digital record system, not a ledger, made submitting data easiest Reported.

Where our sources run out

We could not read DOVU’s or Hedera’s main product pages directly and relied on a Hedera case study, a DOVU post and two news articles. For Grow we read its November 2026 article, the explorer pages for both contracts and one token, and the registry project page linked in the metadata; we did not read the registry’s unit-level records or the project documents, and we did not review the other 52,000 tokens individually. None of the sources defines buffer terms, crediting periods or permanence rules for any named project, and we found no independent audit of any of the three vendors, no independent confirmation of Regen’s sales totals, no actual payments to farmers reported by DOVU, its partner or Grow, and no mapping from Grow’s tokens to registry units. For Triangle Digital we read two public registry project pages and one token, not the registry as a whole, and could not open one news item on a zero-emission mile credit; we found no founding date, dated volumes or price, and no public record of Terra Nova credits that we could match to the reported October 26, 2026 issuance. A separate wallet-infrastructure site that lists Avalanche among dozens of supported chains, and says it was acquired by another company, has not been shown to be the same business, so we did not use it. Dollar figures are as published by the sources named and are not adjusted.

Frequently asked

Can a blockchain verify that a farm stored carbon?

No. A blockchain records what is entered. Measuring soil carbon takes sampling, models and independent verification done before the record is made. None of the extension and university sources we read says blockchain solves measurement.

How much do farmers get paid for carbon credits?

Iowa State’s July 2023 note reports recent prices of about $15 to $30 per tonne for offsets and $5 to $15 per tonne for supply-chain insets, with an illustrative $6 per acre per year. A single farmer interviewed in a separate study cited about $15 per acre. Prices vary widely and these are reported figures.

What has Grow published about carbon credits?

A November 2026 Grow article describes NFTs on the Grow Blockchain for methane avoidance credits from a worm-based waste system at one Washington farm, one token per tonne of CO2e. On the public explorer, the main contract holds 52,600 tokens in one wallet and a second holds 42, while the metadata states totals of 52,788 and 52,679 tonnes. The metadata links a carbon registry project, but the tokens do not say which registry units they mirror or whether those units were retired. Grow is part of the broader Connect ecosystem, which ChainBrief’s media-network operator provides communications services to; see the disclosure at the top of this article.

Does tokenizing a carbon credit prevent double counting?

Only if the original credit is locked or cancelled while the token exists. Triangle Digital says its ledger path does that by freezing the original at its registry, and a Canadian law firm notes that bridges lock the registry credit for this reason. Triangle does not say how its other path avoids double counting, and a blockchain vendor says tokenizing a weak credit improves liquidity, not quality.

Why did Nori shut down?

GeekWire reports that a former co-founder relayed an email from the chief executive blaming a stagnant voluntary carbon market and a tough funding environment. AgNavigator attributes it to uncertainty about how to quantify and credit carbon removal. Both are secondhand reports.

Further reading

• Iowa State Ag Decision Maker A1-40: Carbon farming and stacking payments (July 2023)
• Iowa State Ag Decision Maker: Carbon as a third cash crop? (July 2021)
• Nature (npj Climate Action): Farmer perspectives on carbon markets
• Grow Ecosystem on Medium: Royal Family Farming methane avoidance credits on the Grow chain (Nov 2026)
• Grow Blockchain explorer: the credit collection cited in Grow’s article
• Regen Compute: About
• Hedera: DOVU case study
• Triangle Digital: registry
• Triangle Digital: Terra Nova methane abatement credits release (Sep 2026)
• Osler: Tokenized carbon credits and blockchain (Feb 2025)
• Triangle Digital registry: project page read Nov 15, 2026
• Etherscan: the Triangle project token
• Mintscan: Regen Network
• HashScan: DOVU token on Hedera
• GitHub: Nori contracts repository
• opentaps: Blockchain carbon accounting live on Avalanche mainnet (Sep 2022)
• ESG Post: First third-party validated soil-sample carbon credits (Feb 24, 2026)
• GeekWire: Nori shuts down after seven years (2024)
• ChainBrief: Grow brings agricultural blockchain to the farm
• ChainBrief: Blockchain Beyond Finance series

More in this series: Pharmaceutical track-and-trace · Land and property registries · Series overview · Glossary