CMP1 collects and harmonizes the available data streams, to be synthesized and analysed in CMP1 and ingested in the carbon cycle data assimilation systems developed by CMP2. The optimal monitoring network is designed by CMP3. CMP4 focuses on the carbon budget of tropics (Amazon and Africa). CMP5 provides annual global and regional C-budgets, including sources and sinks. CMP6 addresses the CH4 component of the global C-cycle. CMP7 assesses the economic value of an enhanced global carbon observation system. CMP8 links the project with GEO, the European Commission, decision makers and any other potential stakeholder.