Agricultural activity is a significant contributor to GHG emissions, being responsible for about 9 percent of the total Norwegian GHG emissions. The Norwegian emissions are closely associated with ruminant animals which are important in Norwegian agricult ure, high intensity in the use of fertilizer, and cultivation of peat soils. The main objective is to assess cost efficient ways to reduce GHG emissions from Norwegian agriculture while ensuring important objectives attached to agricultural activity, like food security, rural viability and land amenity values. A major challenge will be to balance multiple and often conflicting objectives, involving both agricultural policy and climate policy. As an analysing tool we will elaborate and apply a sophisticate d economic model for the Norwegian agriculture enabling us to identify trade-offs between social, economic and environmental interest in this resource based sector of the economy. First, we will establish the status of knowledge with respect to how emissi ons depend on a wide area of parameters, e.g., crops, animal type, feeding practice, fertilizer use, and land tillage practice. Based on this survey, national adapted GHG emission coefficients will be identified and attached to farming activities and land use included in the model. Furthermore, the model's spectrum of land use technologies and farm practices will be extended. Emphasize will be put on land use and practices that contributes to lower GHG emissions or even sequester carbon. The elaborated mo del will be used to analyze cost efficient ways to reduce emissions under alternative agricultural policy objectives, taking into consideration adaptation both at the farm level and between farms and regions. We will consider economic incentive structures that might facilitate the adoption of low emission and sequestration technologies. These measures will be analyzed in terms of their capacity to enhance other objectives related to agriculture.