Smart cities are emerging worldwide, addressing the need for sustainable urban development as population grows and cities attract increasingly larger population. The growth of mega-cities around the world is astonishing in terms of the number of cities as well as in terms of population. In order to address the resulting economical and climatic effects, smart cities increasingly employ and enable circular economies that reduce climate impact.

Challenges exist in many directions, including technological, economic, and social, for several application subdomains of smart cities; energy, sustainability, smart transportation, and digital twinning are representative. Clearly, multi-disciplinary approaches are necessary to make a reality the paradigm of smart circular cities. Computing, however, constitutes the common component of all these subdomains, as computing tools and AI approaches have emerged to address most of the important technologies involved in smart cities.

The goal of this special issue in IEEE Computer is to address the domain of smart cities from a computational point of view, to improve the state of the art, and to present recent technological advances and experiences that are employed in smart cities to enable circular economies and reduce their climate impact.


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