The word sustainability has more relevance now than at any other time in the history of mankind. COVID Pandemic has shown us that we cannot take the environment and economy for granted. Call for #atmanirbhar bharat could not have come at a better time. It is high time that we look at hybrid decentralized models of living (and perhaps development). Our roof can meet most of our energy, water and nutrition requirement. Here is a case study on what we call "Sustenance roof" where Rooftop solar plant, Rainwater harvesting, composting and Rooftop garden have been installed . https://www.susmafia.org/post/sustenance-roof