Geotectura Studio unveiled a proposal for a futuristic city comprised of multiple green belts around the equator which could hold the entire human population in a democratic, social, and self-sufficient manner. A series of high-scale arches are developed as sustainable mega-structures in which the whole roof will be a gigantic solar and wind generator with photovoltaic cells and wind turbines. The inhabitants will be able to cross the world in just 5 days with green public transportation while layers of dwelling, agriculture, industries, and recreational areas will be contained inside the “cloud”.