The Global Atmospheric Pollution Forum Air Pollutant Emission Inventory Manual. Version 6.0 May 2019 revision

As air pollutant emissions management has increasingly to be conducted at wider geographical scales (including regional and hemispheric), the development and adoption of compatible approaches by different regional networks, is increasingly necessary. In particular, convergence of approaches for compiling emission inventories will enable the efficient transfer of information and expertise to assist the efforts of those regions with less experience. This Manual has been produced under the auspices of the Global Atmospheric Pollution Forum (the Forum) which is coordinated by the Stockholm Environment Institute (SEI), based at the University of York, U.K. and The International Union of Air Pollution Prevention Associations (IUAPPA). The purpose of the Forum Manual is to provide a simplified and user-friendly framework for emissions inventory preparation that is suitable for use in different developing and rapidly industrialising countries and which is compatible with other major international emissions inventory initiatives. However, the methodologies suggested in the Manual and Workbook are indicative only and the actual level of detail used for different parts of the inventory will vary according to data availability and capacity of the country concerned. In some cases, the level of detail possible will surpass that provided for in the Forum Manual/Workbook and users are then free to use alternative methods or tools so long as these are properly documented. Inventory methods are provided for estimating emissions from the following sources: fuel combustion and transformation; fugitive emissions from fuels; industrial process emissions (non-combustion); emissions from solvent and other product use; emissions from agriculture (including savanna fires); emissions from other vegetation fires and forestry; and emissions from the treatment and disposal of wastes. The air pollutants covered are sulphur dioxide (SO2), oxides of nitrogen (NOx), carbon monoxide (CO), non-methane volatile organic compounds (NMVOC), methane (CH4), ammonia (NH3), particulate matter (PM10, PM2.5, black carbon (BC), organic carbon (OC)) and carbon dioxide (CO2). An Excel workbook (FORUM Workbook Version 7.5.0) has been prepared as a companion to this Manual for use as an aid and tool in preparing national emissions inventories. Use of the Forum Manual and its companion Workbook will, it is hoped, enable non-OECD countries to develop emissions inventories in an accurate, complete, comparable, consistent and transparent manner to support the process of regional cooperation on the modelling and mitigation of transboundary air pollution.