This document summarizes a review study on the effects of adding crumb rubber and rice husk ash to concrete. Crumb rubber is obtained from grinding scrap tires, while rice husk ash is a byproduct of burning rice husks. Both materials are agricultural and industrial wastes that are generated in large quantities annually. The study found that incorporating these wastes as partial replacements for aggregates and cement in concrete can help address the problems of waste disposal while making concrete more sustainable by reducing its environmental impacts. Concrete with crumb rubber and rice husk ash was found to have improved thermal and sound insulation properties compared to normal concrete, though its mechanical strengths were sometimes reduced. More research is still needed to optimize the ratios of these additions to