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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 for the first time, please contact the Technical Support Unit. 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, and 2006 IPCC Guidelines for National Greenhouse Gas Inventories), 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 The old CORINAIR data have been removed as it is outdated.
  • Information on emissions from local and regional air pollutants can be found from a number of sources including the Air Pollutant Emission Factor Library and EMEP/EEA air pollutant emission inventory guidebook.

What's new

15 December 2016 - An error in unit has been detected in the data of carbon content taken from 2006 IPCC Guidelines. This error has been found in 54 data (EF-IDs 117496 - 117549). The unit was erroneously shown as "kg/TJ" and it has been corrected to "kg/GJ" in these data.

28 November 2016 - Updated offline application of the EFDB (version 2.6) is available here

25 August 2016 - Consistency in descriptions in “Source of data” field in the EFDB has been improved to facilitate search/filter functions. Currently, keywords “Peer-reviewed journal”, “National Inventory Report (Annex I)” and “National Communications” can be used to filter the output table to narrow down the search results by sources of data.