Ocean thermal energy conversion (OTEC) offers enormous potential for reducing our dependence on fossil fuels within the next decade by offering an alternative source of electrical power, and the subsequent utilization of cold water effluent for integrated applications. This text presents the scientific principles and development potential of ocean energy resources. It discusses the key factors of OTEC systems, as well as co-products, plus the possible mitigation of global warming with the absorption of atmospheric carbon dioxide. Finally, the text presents an overview of the economic viability, market potential and capital cost estimates. Specific questions and answers are set at the end of each section.