The globe is now inhabited by 6 billion people, twice as many as in 1960. Understanding the effects this population growth has on the environment will be paramount in developing policies that will mitigate the negative environmental effects. This report discusses the relationship between population and environmental change, the forces that mediate this relationship, and how population dynamics specifically affect climate change and land-use change. The author outlines both sides of the policy debate that have emerged-those who would limit fertility and population growth in the developing world and those who call for reduced consumption in the developed world. She concludes by calling for policymakers to pay increased attention to the role of population and forsake the search for one-step solutions to environmental problems.