More than 4Bnt/yr of cement was made in 2020, emitting 3.5Bnt/yr of CO2 that contributed to the continued warming of our climate. Given the increasingly-obvious nature of the effects of temperature rises on global weather patterns, it is clear that emissions must fall. At the same time, it is also apparent that cement and concrete are unique building materials that cannot be easily replaced. Thankfully, there are already several ways to reduce emissions - alternative fuels, the use of supplementary cementitious materials (SCMs) and renewable energy - and even up to CO2 capture and utilisation / storage (CCU/S).
