Completar frases Changing Cities SIA05 U3 AVersión en línea Read the article and fill the empty spaces por Maria Consuelo Garcia Bonilla 1 design noisy neighborhoods million transportation pedestrians crowded traffic population vehicles Changing Cities By the year 2050 , 66% of the people on Earth will live in large cities . That ? s around two - thirds of the world ? s . Most of these people will live in tall apartment buildings , so it makes sense to those buildings in ways that are good for the environment . Gardens on top of buildings , for example , save energy for heating and cooling . They are also a comfortable place for people to spend time ? away from the on the city streets below . Walking from place to place is a big part of city life . However , when pedestrians need to walk across streets , there can be problems . One solution to these problems are the " X - crossings " found in Tokyo , Japan and other cities . There , when the light turns red , all of the cars , buses , and other must stop . Then , the can cross in any direction . Another solution could be with more shops and restaurants on every block . This makes it easier for people to walk to the places they need to go . Every big city needs good ways for people to get around . In the future , more cities will have as many kinds of public as Hong Kong . With more than seven people in a fairly small area , Hong Kong is a place . So , in addition to cars and taxis , Hong Kong residents ride buses , trains , boats , and streetcars ? all good ways to get around the city .
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