Although the material in this textbook is organized to follow a somewhat traditional sequence presented in a physics course, we have tried to order the topics in a way that touches the current interests of students. Solar heating is covered early (Chapter 6), but only after concepts of heat transfer (Chapter 4) and residential energy conserva­tion (Chapter 5) have been discussed. Chapters 8 and 9 deal with the environmental aspects of energy use, namely air pollution (from both stationary and mobile sources), global warming, and thermal pollution. These topics follow Chapter 7 on fossil fuels. The physics of oil exploration and recovery is covered in Chapter 7 as a special topic. Photo voltaics and the rapidly growing area of wind energy follow Chapters 10 and 11 on electrical energy production. New automotive technologies incorporating fuel cells and hybrids and electric vehicles are treated within these two chapters. Nuclear fission is covered in Chapter 14, after a chapter on the fundamentals of atomic and nuclear physics. Chapter 17 covers the broad topic of biomass, from wood combustion to municipal solid waste to the production of alcohol fuels from corn.