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Welcome to EFDB!

  • Nature of EFDB: EFDB is meant to be a recognised library, where users can find emission factors and other parameters with background documentation or technical references that can be used for estimating greenhouse gas emissions and removals. The responsibility of using this information appropriately will always remain with the users themselves.
  • Request for data input: Users are encouraged to provide the EFDB with any relevant proposals on emission factors or other related parameters. If you wish to submit your data, please contact the Technical Support Unit.

    The data proposal should include the following documents:
    1). Filled in EFDB data entry form.
    2). A copy of data sources (e.g., peer-reviewed journal papers).

    Acceptance of such proposals will be subject to evaluation by the EFDB Editorial Board using well-defined criteria.
  • Terminology: EFDB is a database on various parameters to be used in calculation of anthropogenic emissions by sources and removals by sinks of greenhouse gases. It covers not only the so-called "emission factors" but also the other relevant parameters. For convenience sake, however, the term "Emission Factor" or its abbreviation "EF" is sometimes used to represent parameters in this database generally.
  • Software requirements: It is highly recommended to use Microsoft Internet Explorer version 5.0 or higher for best performance. Alternatively Netscape Navigator version 6.0 or higher can be used. It is also recommended to have Microsoft Office 97 or higher for generating Word and Excel outputs.
  • EFDB at present contains the IPCC default data (Revised 1996 IPCC Guidelines, IPCC Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories, IPCC Good Practice Guidance for Land Use, Land-Use Change and Forestry, 2006 IPCC Guidelines for National Greenhouse Gas Inventories and 2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands), and data from peer-reviewed journals and other publications including National Inventory Reports (NIRs). The old CORINAIR data have been removed as it is outdated.
  • Possible useful information (activity data, emission factors and parameters) for estimation of GHG emissions/removals can also be found in other databases. The use of the other databases is the responsibility of the users.
  • In principle, data that do not fully meet the acceptance criteria cannot be included into EFDB. However, there are other data that do not meet the criteria but considered useful to inventory compilers, such as those derived from best available information using expert judgement, etc. To support inventory compilers in case no other information is available, an extra page has been prepared to provide EFDB users with access to such data selected by the EFDB Editorial Board. The EFDB users must carefully read the introductory note to each set of data in this page and take it into consideration when using those data.
  • Frequently asked questions and answers can be found under Help menu item.

What's new

9 September 2020 - Frequently asked questions and answers are uploaded at Help menu.

30 June 2020 - 18th Meeting of the EFDB Editorial Board (EB18), 14-18 and 25 September 2020, Online meeting

1 May 2020 - Lists of EFDB Editorial Board Members for 2020 and 2021 are available here.