--- title: Understanding GHG Methodologies and Third-Party Verification & Validation description: Discover how GHG methodologies and third-party verification ensure legitimate emission reductions in low-emission fertilizers, providing credibility and trust for buyers, regulators, and financiers. image: https://proba.earth/hubfs/Blog%20featured%20image%20(8).png --- [![Proba. In your supply chain, we make the voluntary carbon market work for you.](https://proba.earth/hs-fs/hubfs/positive.png?width=185&height=53&name=positive.png "Proba. 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Search # Understanding GHG Methodologies and Third-Party Verification & Validation 20 Aug 2025 ![Picture of Proba](https://proba.earth/hs-fs/hubfs/Subheading%20(7).png?width=40&name=Subheading%20(7).png) [Proba](https://proba.earth/probas-blog/author/proba) ![](https://proba.earth/hubfs/Blog%20featured%20image%20(8).png) When it comes to the impact of low-emission fertilizers on the footprint of growing crops, food companies want and need more than internal calculations. They want reductions that are quantified with robust methodologies and independently verified. Methodologies define *how* reductions are measured and need to be reported and verified. Verification bodies check that those reductions *are indeed real*.  ### **What Are GHG Methodologies?** GHG methodologies are quantification protocols that make emission reductions measurable. They provide the formulas and factors needed to work out how much CO₂e is avoided when a producer or farmer adopts a new practice or technology and what it means for the footprint of a crop. A methodology defines three things: 1. What counts: which practices or technologies are eligible, and what the baseline (the business-as-usual scenario) looks like. 2. How to measure: data, assumptions, and steps for calculating reductions. 3. How to prove it: the monitoring and reporting requirements that link directly to verification. Without a methodology, reductions are just estimates. With one, they become measurable. ### **Proba Methodologies** At Proba, methodologies are built and reviewed with industry partners and our scientific team. They are grounded in recognized frameworks like ISO-14064 and aligned with SBTi and GHG Protocol. Each methodology undergoes a public consultation and expert review to ensure it reflects the latest science, market needs, and regulatory context. For companies who are active in the agri-food industry, this means Proba’s methodologies are designed for real-world use cases, from fertilizer production changes (green ammonia) to application practices (inhibitors, controlled-release fertilizers). [View Proba's methodologies](https://proba.earth/methodologies) ### **Verification in Practice** This is where Validation and Verification Bodies (VVBs) play their role: - Validation: before a project starts, VVBs check that the plan follows an approved methodology, that the baseline is solid, and that risks are addressed. - Verification: after implementation, VVBs assess the impact, checking the accuracy of data and verifying set out assumptions. Verification takes place on a regular interval, not just once. Both steps are required to turn a reduction into a recognized certificate or Scope 3 claim. Without them, reductions cannot be considered legitimate outside the company itself. [See Proba's approved VVBs](https://proba.earth/proba-standard) ### **Real world example: Agrifirm** [Agrifirm](https://www.agrifirm.com/), a Dutch cooperative with nearly 10,000 farmer members, has launched a program to cut emissions by helping farmers adopt interventions such as low-carbon fertilizers, stabilizers, and renewable fuels. The initiative is built on trusted frameworks like the GHG Protocol and SBTi, and supported by Proba’s methodologies, ensuring that reductions are measured accurately and can be certified with [Scope 3 Reduction Certificates](https://proba.earth/impact-units). [Read more about Agrifirms' initiative](https://proba.earth/probas-blog/agrifirm-helping-farmers-and-food-companies-to-become-more-sustainable)   ### Share: [Share on Facebook](http://www.facebook.com/share.php?u=https://proba.earth/probas-blog/understanding-ghg-methodologies-and-third-party-verification-validation&utm_medium=social&utm_source=facebook) [Share on LinkedIn](http://www.linkedin.com/shareArticle?mini=true&url=https://proba.earth/probas-blog/understanding-ghg-methodologies-and-third-party-verification-validation&utm_medium=social&utm_source=linkedin) [Share on X](https://twitter.com/intent/tweet?original_referer=https://proba.earth/probas-blog/understanding-ghg-methodologies-and-third-party-verification-validation&utm_medium=social&utm_source=twitter&url=https://proba.earth/probas-blog/understanding-ghg-methodologies-and-third-party-verification-validation&utm_medium=social&utm_source=twitter&source=tweetbutton&text=Understanding%20GHG%20Methodologies%20and%20Third-Party%20Verification%20&%20Validation) ## Proba Food companies are asking for verified Scope 3 reductions. It starts with fertilizer. [hello@proba.earth](mailto:hello@proba.earth) [Follow me on LinkedIn](https://www.linkedin.com/company/proba-earth/) ## Related posts Search [Proba receives Conditional Endorsement from ICROA](https://proba.earth/probas-blog/conditional-endorsement-from-icroa) [Calculate the impact of different fertilizer choices](https://proba.earth/probas-blog/calculate-the-impact-of-different-fertilizer-choices) Search ![Subheading (5)](https://proba.earth/hs-fs/hubfs/Subheading%20(5).png?width=317&name=Subheading%20(5).png "Subheading (5)") [Laan van Kronenburg 14, 1183 AS Amstelveen](https://maps.app.goo.gl/aKif8v1k5m9h2zA37)   Food companies are asking for certified Scope 3 reductions. It starts with fertilizer. [Follow us on Facebook](mailto:hello@proba.earth) [Follow us on Facebook](https://www.linkedin.com/company/proba-earth/) Use cases [Quantify fertilizer emissions](https://proba.earth/quantify-fertilizer-emissions-proba) [Certify reductions](https://proba.earth/certify-emission-reductions) [Design projects](https://proba.earth/design-sustainability-projects) [Connect to buyers](https://proba.earth/connect-to-buyers) [Scope 3 progress](https://proba.earth/report-scope-3-progress) [Food companies](https://proba.earth/for-food-companies) [Commodity traders](https://proba.earth/agri-trader) [Agricultural co-ops](https://proba.earth/agri-cooperatives) [Fertilizer producers](https://proba.earth/for-fertilizer-producers) Products [All Proba products](https://proba.earth/products) [MRV Platform](https://proba.earth/mrv-platform) [GHG Methodologies](https://proba.earth/methodologies) [Inset units](https://proba.earth/inset-units) [Registry](https://proba.earth/registry) [Fertilizer calculator](https://proba.earth/fertilizer-emission-calculator) Services [Implementation services](https://proba.earth/implementation-services) [Quick scan](https://proba.earth/fertilizer-emission-calculator) Resources [Blog](https://proba.earth/probas-blog) [Document library](https://proba.earth/document-library) [Public consultation](https://proba.earth/public-consultation) [Approved VVBs](https://proba.earth/approved-vvbs) Company [About us](https://proba.earth/about-proba) [Contact us](https://proba.earth/contact) [Governance](https://proba.earth/proba-governance) [Privacy policy](https://proba.earth/proba-privacy-policy) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Proba", "url" : "https://proba.earth/probas-blog/author/proba" }, "dateModified" : "2025-08-26T07:58:27.367Z", "datePublished" : "2025-08-20T11:56:16.000Z", "headline" : "Understanding GHG Methodologies and Third-Party Verification & Validation", "image" : [ "https://proba.earth/hubfs/Blog%20featured%20image%20(8).png" ], "mainEntityOfPage" : { "@id" : "https://proba.earth/probas-blog/understanding-ghg-methodologies-and-third-party-verification-validation", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://proba.earth/hubfs/positive.png" }, "name" : "Proba World BV" } } ```