OECD/IEA Climate Change Expert Group Papers

This series is designed to make available to a wider readership selected papers on climate change issues that have been prepared for the OECD/IEA Climate Change Expert Group (CCXG). The CCXG (formerly called the Annex I Expert Group) is a group of government delegates from OECD and other industrialised countries. The aim of the group is to promote dialogue and enhance understanding on technical issues in the international climate change negotiations. CCXG papers are developed in consultation with experts from a wide range of developed and developing countries, including those participating in CCXG Global Forums.

The full papers are generally available only in English.

The opinions expressed in these papers are the sole responsibility of the author(s) and do not necessarily reflect the views of the OECD, the IEA or their member countries, or the endorsement of any approach described therein.


Reporting national GHG inventories through Common Reporting Tables (CRTs)

An assessment of CRT reporting options through worked examples

The Modalities, Procedures and Guidelines (MPGs) included in Decision 18/CMA.1 adopted at COP24 in 2018 require all Parties to the Paris Agreement to report national greenhouse gas (GHG) inventories using “common reporting tables” (CRTs). The same decision requests the Subsidiary Body for Scientific and Technological Advice (SBSTA) is to develop CRTs for consideration and adoption by COP26. This paper focuses on key issues related to the potential structure of the CRTs and approaches to filling them in. The paper assesses different CRT reporting scenarios through worked examples. Overall, the paper finds that all the tables contained in the set of Common Reporting Formats (CRFs) currently in use by Annex I Parties provide a valuable starting point for the development of CRTs. A number of improvements and adjustments, however, need to be applied to current CRFs to better reflect reporting guidance outlined in the MPGs. This paper finds that it is important to ensure that the CRTs are designed in a way that allows for a reporting that is as standardised as possible. This may include allowing for the use of standardised reporting elements (e.g. notation keys) and amending the tables according to a new, commonly agreed structure to allow for the reporting of new reporting elements. Using a common format while also facilitating standardised reporting can positively affect a number of processes, including the technical expert review and automated processing of information, thereby promoting transparency, comparability and consistency of GHG-inventory reporting.


Keywords: climate change, GHG inventories, emissions, transparency, reporting
JEL: Q56: Agricultural and Natural Resource Economics; Environmental and Ecological Economics / Environmental Economics / Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth; F53: International Economics / International Relations, National Security, and International Political Economy / International Agreements and Observance; International Organizations; Q58: Agricultural and Natural Resource Economics; Environmental and Ecological Economics / Environmental Economics / Environmental Economics: Government Policy; Q54: Agricultural and Natural Resource Economics; Environmental and Ecological Economics / Environmental Economics / Climate; Natural Disasters and Their Management; Global Warming
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error