The process of manufacturing of ordinary Portland cement (OPC) is energy intensive and creates various environmental problems such as pollution and emission of CO2. There is a need for the an alternative eco-friendly Green Concrete. The waste materials from agriculture, industries, bio-waste, marine waste and e-waste can be recycled and used as a supplementary Green Concrete materials. This will reduce environmental impact of the production of OPC and reduces energy consumption. The application of nanotechnology for a Green building in the current and future is very much significant. The production and implementation of Green Concrete is still in its infancy stage. Academicians and R & D need to step in by promoting application at the industry level. The focus of this review paper is to create awareness to utilize the discarded materials as well as to highlight the new technology to manufacture Green Concrete.
