existence of an irreducible hard science underlying the topic in question, which, in essence, today even more than yesterday, reveals to us how human beings are truly disadvantaged without technology and technologies of the most varied ramifications, and how ethical-legal reasons would be useless and misplaced if they were only declined, in the age of the Internet of Things, in a manner entirely separate from many others of a scientific, architectural or engineeringmathematical, or even medical, or socio-economic not to mention climaticenvironmental or demographic nature.15 II. TRAJECTORIES IN FAVOR OF A VISIONARY AND SUSTAINABLE URBAN IDEA Related to the arguments developed in the preceding paragraph is, in our view, another consequent and related reflection, namely, that inherent in the underlying issues of the problem we are concerned with that we wished to define here as trajectories in favor of a (touristically) visionary and sustainable urban idea Here, on closer inspection, it a matter of wedging into sideways the issues revolving around energy transition and climate change with a view to developing urban policies that are both proleptically thought out in the name of tourist hospitality and the increasingly irreducible need for the preservation and protection of urban space. Under the sign of an indispensable precautionary principle, it is necessary to understand, especially from a jus-publicist perspective, how tourism promotion is always closely linked to its ecological sustainability if it is true, as it is true, that the quality of tourist destinations depends on their natural environment and the receptive strength of each local community. 16 And, in fact, if we look at the most recent follow-ups devoted precisely to the topic of climate and the environment, broadly understood, we realize that more than half of the world’s population now lives in urban centers, a number of people that is growing steadily and will reach two-thirds of the world’s population by 2050. 15 On this openness of thought, in which we recognize ourselves, the pages of M. Serres, The Lame Leftist, Bollati Boringhieri 2016; as well as Id., Against the Good Old Days, Bollati Boringhieri 2018. 16 The thematic horizon, also from a sociological perspective, is well reconstructed by M. Castrignanò, A. Landi, The city and global environmental challenges, Franco Angeli 2023. See, as well, L. Marescotti, Cities, technologies, environment: technologies for sustainability and environmental protection, Feltrinelli 2004; as well as F. Fracchia, S. Vernile, Sustainable development beyond environmental law, Le Regioni 2022. 167 SMART CITIES AND TOURISM
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