The assignment provided is a comprehensive study on the management of construction and demolition waste. It includes a review of life cycle assessment methods for the building industry, sustainable approaches to recycling construction and demolition waste into building materials in Tanzania, and the properties and composition of recycled aggregates from construction and demolition waste suitable for concrete production. The study also explores the potential for cement carbonation as a means of reducing global carbon emissions. Additionally, it examines the use of geographic information system (GIS) technology to manage demolition waste and identifies the key factors that influence the generation and recycling of construction and demolition waste in megacities.