Answer:
Suburban sprawl.
Step-by-step explanation:
Suburban sprawl is a modern urban phenomenon that manifests itself in the expansion of city districts, the creation of new districts (most often suburban areas with a low population density) and the movement of citizens to rural areas near the city.
This phenomenon has a drawback - the authorities of sprawling cities need large sums of money to develop infrastructure in residential areas and provide public services to citizens with which, many times, suburban cities have poorer quality of public services than central cities. Typically, areas with developed infrastructure are located only in the center, so residents of suburban areas have cars, thus increasing pollution.