Once the new kiln is on stream, attention will turn to the processing of CO 2 in terms of its capture, purification, transport and reuse. As part of this process, Holcim is planning to build a cryogenic carbon treatment unit at the Obourg site by early 2028. The aim is to ship purified CO 2 via the Fluxys open-access CO 2 transport network with a view to its sequestration under the North Sea or reuse as a new raw material for the chemical and energy sectors. In so doing, Holcim Belgium is paving the way for creating new ecosystems – a 'Green Valley' – around CO 2 chemistry and the circular economy.