A Strategy for the Application and Marketing of Residual Biomass By-products and a Strategy for the Development of Transboundary Biorefinery Processes will be developed that will contribute to the output indicator RCO83. These strategies will be critical for the successful transfer of residual biomass by-products to other economic sectors within the area of cooperation of the Sudoe space and for the replication of cross-border processes by other organisations. Regarding the first strategy, it is focused on identifying and promoting the use of the most viable residual biomass by-products in different economic sectors within the Sudoe space. To achieve this, lessons learned and good practices from the pilot actions and previous activities of the project will be collected. This strategy will also establish continuous actions and define the economic sectors with the greatest potential for replicability. Within the framework of the implementation of this strategy, guidance and advice will be provided to entities seeking to market and apply the tested by-products and promote the adoption of public measures in the field of reducing agricultural and forest biomass waste. The second strategy will highlight biorefinery processes that have proven to be effective and efficient in converting residual biomass and that can be replicated by other organisations in the area of cooperation. Companies supplying raw materials and trading companies will be identified in the value chains of the selected sectors in order to promote new transnational partnerships that promote the circular economy in different industries. For the implementation of this strategy, the cross-border matching programme will be organised and policy proposals for cross-border cooperation between public authorities will be made.