1. Managing the Earth's Biological Assets -- 2. Consumer Welfare Measurement -- App. Consumer Surplus and Path Dependency -- 3. Producer Welfare and Aggregation of Well Being -- 4. Resource Rents and Rent Capture -- 5. Valuing Nonmarket Benefits -- 6. Evaluating Natural Resource Policy -- 7. Economic Dynamics and Renewable Resource Management -- App. I. Deterministic Optimal Control Methods -- App. II. Stochastic Dynamic Optimisation -- 8. Sustainable Development and Conservation -- 9. Biological Diversity and Habitat -- 10. Threatened and Endangered Species -- 11. Forest Management -- 12. Tropical Deforestation -- 13. Concluding Remarks.