An eco-city or ecocity is "a human settlement modeled on the self-sustaining resilient structure and function of natural ecosystems", as defined by Ecocity Builders (a non-profit organization started by Richard Register who first coined the term). Simply put, an eco-city is an ecologically healthy city. The World Bank defines eco-cities as "cities that enhance the well-being of citizens and society through integrated urban planning and management that harness the benefits of ecological systems and protect and nurture these assets for future generations". Although there is no universally accepted definition of an 'eco-city', among available definitions, there is some consensus on the basic features of an eco-city. The world's population is continuously increasing, which puts a tremendous amount of pressure on cities due to the need for new urban development. There is an urgent need for cities around the world to adapt ecologically based urban development to work towards sustainability. The dimensions of an ecocity provide solutions to improve the living conditions in cities by solving our current unsustainable practices. The cities around the world that face the most severe challenges associated with the world's urban population are those in developing countries. Eco-cities are commonly found to focus on new-build developments, especially in developing nations such as China, wherein foundations are being laid for new eco-cities catering to 500,000 or more inhabitants. History Origins In the first half of the 19th century, the Garden City of Ebenezer Howard, the urbanistic thought of Frank Lloyd Wright and Le Corbusier laid the foundations for a radical change of paradigm and a comprehensive transformation in the urban planning canon. During the post-war era, there was the spread of modernist tower blocks to satisfy the needs of urban slums. Initial ideas behind the eco-cities can be traced back to 1975 with the formation of a non-profit organization called Urban Ecology. Founded by a group of visionary architects and activists including Richard Register in Berkeley, California, the organization worked at the intersection of urban planning, ecology, and public participation to help formulate design concepts centered around building environmentally healthier cities. Some of their efforts included initiating movements to plant trees along the main streets, promoting the construction of solar greenhouses, developing environment-friendly policies by working with the Berkeley city planning division and encouraging public transportation. Building on these strategies, Richard Register later coined the term 'ecocity' in his 1987 book titled "Ecocity Berkeley: Building Cities for