5.1 The Tragedy of the Commons 5.2 Clearcutting 5.3 The Green Revolution 5.4 Impacts of Agricultural Practices 5.5 Irrigation Methods 5.6 Pest Control Methods 5.7 Meat Production Methods 5.8 Impacts of Overfishing 5.9 Impacts of Mining 5.10 Impacts of Urbanization 5.11 Ecological Footprints 5.12 Introduction to Sustainability 5.13 Methods to Reduce Urban Runoff 5.14 Integrated Pest Management 7 5.15 Sustainable农业5.16水产养殖5.17可持续林业