Emission Inventory for greehouse gases Paris
Topic of the practice
Paris has a GHG Emission Inventory addressing CO2, CH4 and N2O emission data related to the EI data: they are computed following the same approach; only the emission factors are different.
Good Practice Information
Airparif - the association officially in charge of air quality management in Ile-de-France - has developped a set of data bases and programs to compute easily annual GHG emission inventories. As for the air pollutant emission inventory, the data bases contain activity data and emission factors data. As far as possible, bottom-up approaches are applied to compute the emissions; activity data are as far as possible specific to the Ile-de-France region; emission factors come from well recognized institutions (national: CITEPA or European such as EMEP). Since the emission inventory is built-up in cooperation with neighbouring regions, there has been an important effort done to make it rely on official, easy-to-find (for any region) data. Also an important effort has been made to track changes in the data and / or programs.
Regarding the financial spect, the data used are often free of charge or available at a minor cost; maintaining the whole system (air pollutant EI and GHG EI) up-to-date and running it requires at least one person. The stakeolders are the participants from neighbouring regions; public authorities at the regional, local and also national levels. Key success factors and conditions for potential transfer are mainly the availability of the data sets.
Evidence of success
At Airparif, implementation of Greenhouse Gases (GHG) in the air pollutants emission inventory took place in 2000. Based on this long experience and on DCMR (project partner 2) similar expertise, good practices could be identify and recommended. Thanks to the project, Citeair could futher investigate the issue of GHGs sink in Ile de France and therefore strengthen its emission inventory and improve its quality. The Airparif GHG emission inventory has been used recently in many planification exercises in Ile-de-France.
Contact details to obtain further information on the practice
Annex completed on: 03-23-2011