For a more ecological and sustainable city In France, the economy is flourishing, and projects are expanding around the world in a proactive manner. to reconcile the city and the environment. In addition to these showcases, which can be used as a laboratory for sustainable architecture, our cities will need to be identified in the year and year. come from many challenges to become more ecological. public. Housing, housing and transportation; the general origin of gas emissions; greenhouse effect and fine particulate matter, the reduction of which is a major objective. Water resources management is also becoming an increasingly critical issue, with increased productivity. Treatment of waste will also continue. engage all public and private actors, with the promotion of sorting, recycling, and recycling to develop the circular economy. The city of the future will also have a growing focus on biodiversity conservation, with the development of green spaces and adoption of practices such as late mowing.     Smart city, smart and connected The dizzying developments around new technologies have given rise to à birth A change in usage that has benefited urban areas since the beginning of the 21st century. The Smart City uses the most innovative Internet Of Things (IoT) solutions to provide new responses to behavioural and ecosystem changes in the economic, social and environmental fields. Collected data and exchange of information in a timely manner allow for quick decision-making, and encourage reflections on the changes expected by the different actors in contemporary cities in terms of services, infrastructure and land use. Inhabitants, businesses and service providers, businesses and employees, territorial governments and communities, policy makers can appropriate urban space and improve quality; daily life. The city of the future will be smart and connected, and will have to gain even more agile; to meet the challenges ahead. More sustainable and ecological, the city of tomorrow will also have to be more resilient, particularly in the face of extreme climate change. Associated with services and objects, the smart city will demonstrate agility; to provide effective solutions to tensions around mobility; Transport, Housing and Mixture; Social. Idealys, the initiator of smart city solutions, presents you with the main challenges ahead of the cities of the future, and the responses adopted to respond.