As we further congregate in cities, it has become more important to make cities not only green, but also efficient. As a result, we are now seeing some early examples of what I would describe as eco-friendly cities. There are several cities that are focusing on specific aspects that help it run efficiently, such as on their transport, energy and waste management. In example, implementation of smart grids is being pushed heavily for smart energy management. Major energy companies like GE are building and operating smart grids for cities such as Atlanta for a monthly fee through a cloud platform.While smart energy is essential, it is not the only aspect of a Smart City. A more coherent view of what exactly a Smart City is was made by my team at Frost & Sullivan, who scanned through numerous Smart City projects and initiatives currently undertaken globally and found some key parallels among them. We identified eight key aspects that define a Smart City: smart governance, smart energy, smart building, smart mobility, smart infrastructure, smart technology, smart healthcare and smart citizen.