Population density, the number of people per square mile, is an indicator of suburban sprawl. A large city with a low population density will be spread across a broader geographic area than an equally sized city with a higher level of density. The lower the density, the more land it takes to fit all of a city's residents. The more land, the longer people must drive for work or to get groceries, the more lawn there is too water, the more the natural environment is reclaimed for malls and yards and roads. There are many benefits to having a . . .