Over the next 25 to 45 years, scientists think the Nation’s population will double. As the population increases, cities, suburbs, and towns use more and more land. In order to keep some open space, the government makes environmental policies that everyone must follow. The scientists in this study wanted to answer two questions. The first question is: What are the characteristics of the policies that have been used to manage urban growth and protect open space? The second question is: Which of th Topics: Social Science, Wilderness, Environmental Policy, Land Use, Policy Analysis, Urban Sprawl.