uman beings produce a lot of waste which can be used as recycled materials for benefits to the societies toward clean and green environments. Recycle Concrete Aggregate (RCA) from demolition buildings and dumping construction sites, Engineered Cementitious Concrete (ECC), Palm Oil Fuel Ash (POFA) from palm oil factories and Wood-wool Cement Board (WWCB) from softwood and hardwood can be used as construction materials are presented in this book. These recycled materials are recommended to be used for the construction of structural components such as wall panels, beams, columns and slabs for residential houses, warehouses, shop lots and commercial buildings. Cold in-Place Recycling (CIPR) and Nano Charcoal Ash (NCA) is produced after burning the coconut shell can be utilized in the construction of roads and highways are also discussed in this book. By using recycled construction materials in developing and constructing structures and infrastructures, we can sustain our green environment for our future generation. Henceforth, our world will be become green, less emission of CO2, save from chemical waste, fresh atmosphere and reduce the global warming effects which become serious in recent years.