<p>The direct CO₂ emissions of the cement production industry have increased significantly, accounting for approximately 7% of the CO₂ emissions. Rice husk ash (RHA), an agricultural byproduct, has gained substantial interest as a commonly used supplementary cementitious materials (SCMs) and shows potential application in concrete. This study comprehensively examines existing literature on ternary and quaternary cementitious composites mixed with RHA, providing a detailed overview of their mechanical properties, durability, and CO₂ emissions. Analysis shows that the use of combinations of RHA and other materials as SCMs improves the mechanical and durability properties of cementitious composites and reduces CO₂ emissions during concrete production when compared with that of replacing aggregates. Specifically, the synergistic use of RHA and olive waste ash increases compressive strength by 58.7%, and the synergistic use of RHA and steel fiber increases flexural strength by 78.4%. The combination of RHA, steel fiber, and waste marble powder increases splitting tensile strength by 96.5%, and the synergistic use of RHA and bacteria increases water absorption resistance by 69% and chloride resistance by 83%. The combination of RHA and bacteria increases permeability resistance by 83%. Furthermore, the synergistic use of RHA and nano-CuO also increases permeability resistance by 51.88%. Finally, the synergistic use of RHA and fly ash achieves the optimal reduction in CO₂ emissions.&#xa0;Consequently, considering the challenges of global warming and climate change, this comprehensive review can be a reference for further exploring the utilization of RHA in building materials.</p>