The emissions from the agriculture sector are calculated by multiplying the activity data and emission factors. The numbers are part of the Norwegian emission inventory. The emissions both from heating of buildings and from the core activities in the sector are included.
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Typical activity data related to the agriculture sector is the amount of livestock and consumption of fertilizer. Livestock leads to emissions of methane, while microbiological processes in the soil lead to emissions of N2O. Usage of fertilizers and silos lead to emissions of ammonia. Expert Knowledge of such processes is used to calculate emissions factors.
The Emission Inventory is compiled by the Climate and Pollution Agency together with Statistics Norway. The Climate and Pollution Agency is responsible for developing emission factors and for collection of information from point sources. Statistics Norway is responsible for developing data models to model the emissions and to collect activity data. Statistics Norway also does the calculations by applying the data model.
The data for the agricultural sector is published about one year after the collection of the data. Emissions that occurred in 2009 will be published at the beginning of 2011.