Renewable energies are the basic technology for building smart cities of the future

By 2050 More than, half of the world's population lives in cities. Urban areas are affected by 70 percent of emissions. Pushing the planet into an. unknown climate, but the challenge is clear and urgent: cities must be re-planned. Rapid urbanization has led to additional challenges such as traffic congestion, Social inequalities, water pollution urban change and related health and pollution issues.“We are at a tipping point.” so we need a “planning revolution” that produces cities. With a strategic and. compact structure with mixed-use, lands and buildings, with a focus on integrated urban systems, including walls, green roofs, decentralized energy systems, biodiversity corridors, complete networks and their operation by, renewable energy sources, and better use of spare capacity. through a shared urban economy.One of the goals of smart cities is to create a “three-dimensional 3D” computer model so that the progress of things can be monitored and controlled by officials. One of the findings of the research is that smart city models are expected to spread on a large scale, and these models will form the basic rules of the city and development plans, smart cities reduce greenhouse gases because they lack carbon dioxide, future smart cities depend on electric energy mainly to run all Almost something, the discovery of different types of organic building materials, which are distinguished by different degrees of permeability, that is,architectural building blocks consisting of fibrous materials in fungal roots, as strong as concrete and insulating as "fiberglass".