The Clean Cement Line Project aims to develop and demonstrate, on an industrial scale, a new cement production technology at the Outão Cement Plant in Portugal. This nearly €90 million project includes four R&D sub-projects aimed at: eliminating the dependence on fossil fuels, increasing energy efficiency including the self-generation of electricity, integration of digitalisation in the production process and the reduction of CO₂ emissions by at least 20%. These innovations will promote the development of the production of a low carbon clinker and consequently the creation of a range of a low carbon footprint line of cements.