1. Natural ecosystems perform a number of "natural services" that are vital to human interests. What are these services?
2. As natural resources, ecosystems are put to both consumptive and productive uses. What are the distinctions between these two kinds of use?
3. Exploitation and overuse of natural systems is pervasive and nonsustainable. How do the concepts of maximum sustained yield and the tragedy of the commons help us to understand these problems?
4. Forests are highly productive ecosystems that perform a host of natural services and provide lumber, fuel, and paper for the world’s economy. However, in many parts of the world forests are being cleared. Why is this happening, and what are its immediate consequences?
5. Temperate and tropical forests can be managed sustainably. What are some patterns of forest management, and what are the components of sustainable forestry?
6. The harvest of fish and shellfish has reached a plateau worldwide, and many once-abundant fisheries are no longer viable. What is causing these changes, and how can the declines be reversed?
7. Public lands occupy 40% of the land area of the United States and represent a vital national treasure. How are federal lands being managed for sustainability?
8. Attempts to combat pollution, restrict overuse of natural systems, and preserve biodiversity have generated an environmental backlash. Why is this, and how has it influenced public policy?

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