Unit 1: Environmental philosophy -- Is the precautionary principle a sound approach to risk analysis? -- Is sustainable development compatible with human welfare? -- Should a price be put on the goods and services provided by the world's ecosystems? -- Unit 2: Principles versus politics -- Should North America's landscape be restored to its pre-human state? -- Should the military be exempt from environmental regulations? -- Will restricting carbon emissions damage the U.S. economy? -- Unit 3: Energy issues -- Should we drill for offshore oil? -- Is carbon capture technology ready to limit carbon emissions? -- Is it time to put geothermal energy development on the fast track? -- Should cars be more efficient? -- Are biofuels responsible for rising food prices? -- Is it time to revive nuclear power? -- Unit 4: Food and population -- Are improved aid policies the best way to improve global food supply and protect world population? -- Is genetic engineering the answer to hunger? -- Can organic farming feed the world? -- Unit 5: Toxic chemicals -- Should DDT be banned worldwide? -- Do environmental hormone mimics pose a potentially serious health threat? -- Is the superfund program successfully protecting human health from hazardous materials? -- Should the United States reprocess spent nuclear fuel?