Green Building is a technology which has been developed and put forward in recent years, so as to lead our world towards economic, global as well as social sustainability. Green buildings are quite related to sustainable buildings and they are interchangeable. Green buildings are helpful considering several factors like reduction of carbon footprint, usage renewable energies, use of less energy,usage of smart materials and so on. In recent times, world is facing a major problem of drastic climate change. A major contributor to climate change is the construction industry. Buildings are responsible for an estimated 33% global greenhouse gas emission. Between 1971 and 2004, Carbon dioxide (CO2) grew 2.5% for commercial buildings and 1.7% for residential buildings. This puts the concept of green building in light. Government all around the globe have started to take this concept solemnly. Few organizations are in place for rating green buildings. LEED also known as Leadership in Energy and Environmental design is one of the leading organization. Green building rating system in India are Green Rating for Integrated Habitat Assessment (GRIHA), Indian Green Building Council (IGBC). These organizations rate the buildings on various factors like operation, cost, maintenance, etc. The intention of writing this paper is to acquaint everyone with green building.