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Pillar 4 of 4

MRV — Measurement, Reporting & Verification

Every claim a carbon project makes is only as good as the data behind it. MRV is the discipline of measuring emissions accurately, reporting them transparently, and having an independent third party verify both.

Methodology hubBrowse scored projects
What it is

MRV is the end-to-end pipeline that turns physical reality into a registered tonne of CO₂e:

  • Measurement — sampling protocols, remote sensing, sensors, models.
  • Reporting — structured submissions to a registry following an approved methodology.
  • Verification — independent audit by an accredited Validation/Verification Body (VVB) such as SCS Global, DNV, TÜV SÜD or AENOR.
Why it matters

Weak MRV is the upstream cause of every famous carbon-credit scandal — phantom forests, over-credited cookstoves, double-counted renewables. Strong MRV is what makes a credit defensible to your auditor, your regulator, and your shareholders.

How we assess it

Methodology version

We track which version of the methodology applies and flag projects still using deprecated approaches (e.g. pre-VM0048 REDD+).

VVB credibility

We score the verifier on accreditation, sector experience and any past suspensions or non-conformity reports.

Data source mix

We prefer projects combining remote sensing + ground-truthing + community monitoring over single-source reporting.

Reporting cadence

We track time between issuance and last verification — credits >24 months without re-verification are down-scored.

Standards we recognise
  • Verra VCS Program
    World's largest voluntary registry; full methodology library and program rules across AFOLU, energy, transport, waste.
  • Gold Standard for the Global Goals
    Strong on sustainable-development co-benefits, mandatory stakeholder consultation, and SDG impact reporting.
  • American Carbon Registry (ACR)
    US-focused registry with rigorous protocols for forestry, agriculture and industrial gases.
  • Climate Action Reserve (CAR)
    Domestic-US protocols emphasising transparency and over-counting safeguards.
  • Puro Standard
    Engineered carbon removal (biochar, BiCRS, mineralisation) with strict durability tiers.
  • Article 6.4 (UN Paris)
    The successor to the CDM, currently being operationalised by the Article 6.4 Supervisory Body.
  • ICVCM Core Carbon Principles
    Independent integrity benchmark; programs and methodologies receive a CCP-eligible label after assessment.
Red flags we look for
  • Methodology version retired or superseded by the registry.
  • VVB sanctioned, suspended, or with documented conflicts of interest.
  • Single-source measurement with no independent ground-truthing.
  • Last verification more than 24 months old with no scheduled audit.
  • Reporting documents missing, paywalled, or inconsistent across versions.
Further reading
Leakage