In case you don't know, urban sprawl is simply another way of saying urbanization. Urban sprawl is the movement of a group of people from urban to the rural part of the city. This finally results in the spreading of the urban area into the rural area. Urban sprawl leads to the continuous commercial and residential growth of an undeveloped land. This usually happens when people are moving to a better area to live due to the increased population in their current place. This is how the world has been moving since the beginning.
