Trade internationalization and globalization have profoundly modifed urban landscapes, encouraging activity polarization in urban areas. By 2050, 2/3 of the world’s population will be concentrated in these cities. This increasing urbanization will affect the environment and climate: vast space occupation, acute use of natural resources (water, energy, natural habitat…) and increased pollution (air pollution, waste, etc.). The OECD has pointed out that today, large world mega-poles occupy 2% of the surface of the globe but consume 75% of the energy produced by the planet and emit 80% of the CO2 linked to human activity. Many actors are already striving to develop the cities and regions of tomorrow, resilient to the impact of climate change, energy efficient, desirable for the inhabitants and acceptable for all (partner and participative governance). Discover the solutions and initiatives that are already in place!