Cities are locked into an energy system unfit for the challenges ahead. Through their buildings, transport systems, and other consumables, cities are voracious energy users, with astronomical energy needs. All this results in higher greenhouse gas emissions, rising levels of pollution, and increasing mortality and health effects.

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The urban energy system relies on antiquated, centralized, and privatized energy sources, despite efforts to decarbonize them. However, beneath the surface, there's a transition taking shape, with microgrids, distributed energy networks, and greener travel demonstrating how cities can open the door to a net zero future. ​Cities also have a wealth of resources that can be shared and redistributed quickly and efficiently. Allowing people to use fewer resources, by owning less and consuming less. This new sharing economy can serve as a platform for a healthier living as well as a catalyst for decarbonization and the many benefits we can claim by unlocking sustainability.