MRV can refer to different things depending on the context. Here are some possible meanings:

• Measurement, Reporting, and Verification: This is a multi-step process to measure the amount of greenhouse gas (GHG) emissions and prove that an activity has actually avoided or removed harmful GHG emissions. This is important to convert actions into credits with monetary value, which are the basic units traded in international carbon markets and used to fulfill countries’ Nationally Determined Contributions (NDCs) under the Paris Agreement. MRV is the key to unlocking climate finance and showing progress on climate goals.

• Magnetic Resonance Venography: This is a non-invasive imaging technique that uses magnets, radiofrequencies, and intravenous (IV) contrast dye to create detailed images of the veins in the body. It can help diagnose conditions that impair normal venous drainage, such as blood clots, structural vein abnormalities, and intracranial hypertension. The same equipment that is used for an MRI is used for an MRV.

In summary, MRV can refer to a process to measure and verify greenhouse gas emissions or to a medical imaging technique to visualize veins in the body.