“We reduced methane by 100 tonnes” and “We issued 2,700 carbon credits” sound similar, but they are different statements. The first is a performance claim that emissions fell relative to a specific baseline and under a particular method. The second means that tradable units with serial numbers were created through verification, registration, and issuance under a program’s rules. A finding that reductions occurred does not automatically turn them into credits.

Confusion grows when the scope of a claim expands. If a farm carries out a reduction activity, a feed company reports the result as a supply-chain reduction, and a platform sells the same amount as credits, their accounting and public statements may conflict. Unless it is clear who claims what and which rights were transferred, the same environmental outcome may appear to have been used more than once.

Start by separating three ledgers

The first is the greenhouse gas inventory. It calculates emissions generated during a given period within a company’s or farm’s organizational boundary, according to Scope 1, 2, 3, or other defined categories. The inventory asks, “How much was emitted in our value chain?” Activity data, emission factors, direct measurement, boundaries, and the base year are central.

The second is the project performance ledger. It estimates reductions or removals by comparing a project scenario with the baseline scenario in which the intervention did not occur. Conditions such as additionality, leakage, permanence, and monitoring uncertainty may apply. Project performance is related to changes in an inventory, but the numbers do not always match because project methodologies and corporate inventories can have different purposes, boundaries, and calculation rules.

The third is the credit ledger. It tracks whose account holds units issued from verified outcomes under an approved program, whether they have been transferred, and whether they have been retired for use in a final claim. Many voluntary crediting programs define 1 unit as 1 tCO₂e, but the unit definition of the applicable program, methodology, and registry must be checked. The methodology, vintage, project, and registry from which a unit originates determine its quality and possible uses.

Combining the three ledgers into one number creates problems. Buying credits does not make a company’s physical emissions disappear. Conversely, a decrease in inventory emissions does not automatically create credits that can be sold.

What does an emissions-reduction claim say?

A reduction claim is a comparative statement. It says that emissions declined relative to a reference period or counterfactual baseline. A “20% reduction” therefore requires, at minimum, a defined subject, period, boundary, baseline, calculation method, and unit of comparison. Results at the same site can differ depending on whether they refer to the farm’s total emissions, emissions per dairy cow, or emissions per 1 kg of milk.

A sound reduction claim separates observed facts from interpretation. The measurement finding that “the average emission rate on valid observation days during the feeding period was lower than in the predefined comparison group” and the causal judgment that “this difference resulted from the feed intervention” require separate review. It is necessary to explain whether season, herd size, feed intake, production, and changes in ventilation were controlled.

A company may describe an intervention within its value chain as a Scope 3 reduction activity. Even then, it must follow organizational inventory rules, traceability requirements, supplier allocation, and the policy for recalculating the base year. Broader terms such as “carbon neutral,” “net zero,” and “fully offset” carry far more conditions and potential for misunderstanding than a simple reduction claim.

The additional steps required to create a credit

A carbon credit adds institutional procedures on top of measurement results. In general, a project selects an applicable standard and methodology, prepares project documents, and undergoes independent validation and verification processes as well as registry review. Units can be issued only after the outcome for the monitoring period is approved. The exact sequence and terminology vary by program.

Additionality is a central issue. If a reduction would have occurred without credit revenue—for example, because it is legally required or the practice is already sufficiently economical—its eligibility for credit issuance is subject to strict review. An overstated baseline can create reductions that never existed. Leakage that shifts emissions outside the project, the risk that outcomes are later reversed, duplicate registration, and duplicate issuance must also be managed.

Issuance and use are also different. Credits held in an account or traded may not yet have been used for a final claim. To use a credit for a specific claim, it is generally retired in the registry so it cannot be traded again, with the retiring party, beneficiary, and purpose recorded. A purchase agreement without evidence of retirement may be insufficient to support a claim that emissions were “offset.”

Can multiple parties speak about the same reduction?

Different types of duplication must be distinguished. If one project issues two credits for the same 1 tCO₂e, that is duplicate issuance. If the same issued unit is retired twice or sold to two buyers, that is duplicate use. If two parties each present the same reduction as achievement of their own target, it may be a duplicate claim. The specific criteria for judging duplicate claims can vary with the applicable program, purchase agreement, national authorization, and purpose of use.

Value-chain greenhouse gas accounting, however, is designed so that different companies’ inventories overlap. A farm’s direct emissions are Scope 1 for the farm operator and can be Scope 3 for a purchasing company. This overlap is inherent in the design of corporate inventories and does not itself imply wrongdoing. Problems arise when the overlap is concealed or when multiple parties portray contractually transferred environmental attributes as their own exclusive achievement.

Farms, feed companies, food companies, and platforms should therefore agree separately on “who counts the emissions in an inventory,” “who owns the economic rights to the project outcome,” “who issues, sells, and retires the credits,” and “what wording each party may use.”

Why buying credits does not replace internal reductions

High-quality credits can channel climate finance to projects that need it. They are not, however, the same as activities that reduce emissions from a company’s facilities, energy use, and supply chain. The VCMI Claims Code sets out an approach in which companies use high-quality credits in addition to pursuing a science-aligned reduction pathway. The applicable version and publication date should be checked again on the official page at the time of publication. Trust is weakened when credit use is described in a way that justifies delaying internal reductions.

It is important for an inventory to show gross emissions and credit use separately. For example, “gross emissions of 100,000 tCO₂e, value-chain reductions of 10,000 tCO₂e, and 5,000 tCO₂e of credits retired” makes each role clear and allows readers to distinguish physical outcomes from compensatory action. Reporting only “net emissions of 85,000 tCO₂e” makes it difficult to tell how much changed internally.

Points that require particular attention for livestock methane

For methane, the methodology and choice of global warming potential affect conversion to CO₂ equivalent. The number of kgCO₂e assigned to 1 kg of non-fossil methane can vary by the applicable standard and assessment horizon. Moving a project’s factor into a corporate inventory without explanation can produce conflicting numbers across reports.

It is also necessary to confirm whether the feed intervention was actually consumed, the composition of the animal population, productivity, changes in manure emissions, and the representativeness of measurement. Even if enteric methane decreases, emissions from feed production or logistics may rise. Effects outside a project methodology’s boundary should still be reviewed as potentially material side effects when making an overall environmental claim.

Concentration-sensor records can be input evidence for a project, but they are not credits themselves. The conversion from concentration to mass emissions, the baseline, uncertainty, data quality management, and 3rd-party verification all have to be addressed. Technical features such as “stored on a blockchain” or “analyzed by AI” do not substitute for methodological suitability and environmental integrity.

Checklist before making a claim

  1. Does this statement concern an inventory change, project reduction, credit issuance, purchase, or retirement?

  2. Are the organization, farm, or product, the period, the baseline, and the unit specified?

  3. Can the reduction methodology, verification status, and uncertainty be checked?

  4. If it is a credit, are the program, project ID, vintage, serial number, and registry status available?

  5. Are ownership of the environmental attributes and the right to make claims separated by contract?

  6. How do other supply-chain participants or the country report the same outcome?

  7. Has credit use been placed ahead of internal reduction or expanded into an excessive carbon-neutrality claim?

Conclusion: identify the type of claim before presenting the number

A carbon-reduction claim describes an actual change in emissions, while a carbon credit is a unit that can be issued, transferred, and retired after review and registration under a defined program. The two concepts can be connected, but they do not automatically become the same. A corporate inventory, a project performance record, and a credit registry are ledgers with different purposes.

Trustworthy communication begins not with sweeping language but with precise boundaries. It should show where the reduction occurred and who calculated it, whether credits were actually issued and retired, and whether claims overlap with those of other parties. The clearer these distinctions are, the more carbon data can serve as evidence supporting decisions and transactions rather than merely as marketing language.

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