One result of population growth within cities is something called urban expansion, which is the unrestricted growth of housing, businesses, and roads without any specific planning. Urban expansion influences cities’ social and environmental dynamics, causing a number of disadvantages, including longer commutes, higher transportation costs, pollution, and loss of countryside.

City planners and researchers claim that more and more people are moving into cities, which is contributing to something called urban density. This term refers to the number of people within an urban area. It’s a crucial factor for city planning — understanding how the city is functioning based on economics, health, geography, and sustainability.