The main objective of this contract is provision of a coherent suite of user-focused visualization and explanatory products and tools within the Copernicus Atmosphere Monitoring Service (CAMS), aimed at providing scientifically accurate, accessible, and policy-relevant information on greenhouse gases. The contract shall be structured across four main Work Packages: (WP1) a fully operational interactive dashboard for visualizing GHG data, (WP2) a series of explanatory videos to communicate key concepts and findings, (WP3) a Science-Explained section presenting structured text, graphics, and “Big Questions” for non-expert audiences, and (WP0) project management and coordination, including quality assurance and cross-WP oversight. Tenderers are invited to propose additional tasks or work packages if they consider them necessary to achieve the objectives efficiently and enhance the overall quality and impact of the project. The contract will support ECMWF in delivering high-quality information to policymakers, educators, journalists, civil society, and the wider public, facilitating informed decision-making, understanding of GHG emissions, and the assessment of mitigation efforts.