Measurement, reporting and verification (MRV)
A system for measuring emissions or actions, reporting the results and checking them against defined criteria.
Example
Under the Paris Agreement, countries report emissions and progress through a common transparency framework that includes technical expert review.
The catch
Results depend on which values are measured directly, which are estimated and how independent the checks are.
Related terms
Paris Agreement, Reporting, Transparency, Audit trail, Calibration, Carbon neutral
In more depth
Measurement, reporting and verification (MRV), explained.
MRV turns a physical change into a figure other people can rely on, and each stage inherits the weaknesses of the one before. Some frameworks expand the M as monitoring, which stresses routine data collection across a whole period.
The operator usually measures and reports, while verification belongs to someone without a stake in the result. In carbon crediting the sequence ends with a registry issuing units, so an error in the field can become a tradable asset. Digital tools such as connected sensors can shorten the cycle, yet their data still need calibration checks and secure storage, since automation can repeat a fault at scale. Good MRV also keeps evidence long enough for later checks, because questions about a credit can surface years after it was issued.