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It is shown in this article that the current European legislation makes the future progress of smart cities critically dependent on the advancement of the green economy and consequently on the further development of energy efficiency and of renewable energy sources. However, the lack of a clear legal framework capable of transforming the current pledges into binding rules at national level can jeopardize the establishment of a more direct and profitable link between the extensive European legislation on energy and environment, and the harmonious and efficient development of smart cities in Europe.
Rosario Ferrara (Tue,) studied this question.