The four ERA-NETs FACCE ERA-GAS, ICT-AGRI-FOOD, SusCrop and SusAn have coordinated and aligned efforts in areas of mutual interest and established a joint transnational funding initiative in the field of agricultural greenhouse gas (GHG) research, focusing on circularity in mixed crops and livestock farming systems with emphasis on climate change mitigation and adaptation. Traditional mixed crop-livestock farming has been a successful model for centuries, but since the 1960s, there has been a shift towards specialized farming, resulting in environmental challenges such as the simplification of crop rotations and higher use of mineral fertilizers and pesticides. By integrating crops, animals, and soil and adopting a circular economy approach, which prevents waste and reuses or recycles materials, the agriculture industry could reduce emissions, increase efficiency, enhance resilience, and maintain biodiversity. This call aims to renew knowledge that fits current production and market conditions and address the monitoring and mitigation of GHG emissions. Projects under this call also include an Information and Communication Technology dimension, facilitating complex networks and supporting decisions through data collection and analysis, ultimately improving farm management and farming technologies.