Listen to this example in Santander, Spain. Then, do the quizz.
https://www.eslvideo.com/quiz.php?id=27681
Now have a look to these graphics (one per team) and explain them to the rest of the class; Barcelona is given as an example of smart city: why?:
Now you have to put in common what are the features of a smart city, classify them and produce your own poster. How can we improve our towns? We can write our representatives and make proposals to improve our lives! Have a look: https://www.worldcrunch.com/tech-science/how-tiny-andorra-became-a-major-hub-in-smart-cities-movement
Ideas: Brainstorm > Mind map.