As we are progressing, there is a digressional movement away from sustainable development. It has led the world to challenges such as Climate change and Green House enveloping of our planet. The building and construction industry are significant contributor in it due to poor integration of the technology, like, while using Glass on facades to have natural lighting, higher heat gains also happened in parallel which led to higher air-conditioning. The increased demand required more of energy and released more Greenhouse gases. Historically speaking, our forefathers had already been using passive lighting, ventilation and energy systems which can combat the modern-day challenges. Therefore, we ought to understand and use more of passive design for lighting, ventilation and allied services and energy systems. Governments and other agencies have also realised its importance. They have developed a few Green rating systems such as BEESTAR, GRIHA, LEED etc. which rate a building based on its performance and energy consumption. There are different criteria used in each of them to rate a building and each system has its own pros and cons. In the next posts we will discuss about Green rating systems in India and how it can be used to design better and in a more sustainable fashion.