Statistics Norway and the Norwegian Environment Agency calculate the total annual national emissions to air of 19 emission components.
The inventory includes emission figures from companies’ annual reports to the authorities. In that case it is the emissions from the largest point sources that are used in the inventory. For emissions sources that are not subject to a reporting obligation, the emissions are calculated on the basis of activity data and emission factors. The total cross-sector amount of emissions for other emission components, and for emissions to water in general, have not been calculated in this way.