CHE is a project ended in 2020 and funded under the Horizon 2020 Programme, bringing together European expertise and a consolidated approach to building an operational anthropogenic CO2 emission  monitoring support capacity.

CHE partners are at the forefront of developments in the compilation of emission inventories, the observation of the carbon cycle from ground-based and satellite measurements, the process modelling of the carbon cycle, atmospheric transport modelling, and data assimilation and inversion systems. The four main areas of work of CHE coverered: observations, emission inventories, modelling and inversion systems.