Unit 1. Fossil fuels. Can the United States continue to rely on oil as a major source of energy?; Is it realistic for the United States to move toward greater energy independence?; Should cars be more efficient?; Should the Arctic National Wildlife refuge be opened to oil drilling?; Should utilities burn more coal? -- Unit 2. Global warming. Are global warming facts too uncertain to guide government policy?; Is global warming skepticism just smoke and mirrors?; Are the potential costs of global warming too high to ignore?; can carbon trading help control carbon emissions?; Is Geoengineering a possible answer to global warming? -- Unit 3. Nuclear power. Does nuclear power need government help?; Should the United States continue to focus plans for permanent nuclear waste disposal exclusively at Yucca mountain?; Should the United States reprocess spent nuclear fuel? -- Unit 4. Alternative energy sources. Is wind power green?; Do biofuels enhance energy security?; Can hydropower play a role in preventing climate change?; Will hydrogen replace fossil fuels for cars?; Is there any such thing as free energy?