In the last century, humanity reached a level of development where the society is totally dependent on planetary-scale uses of energy extracted from a very complex system and often consumed irresponsibly. In publication since 1975, Energy: Principles, Problems, Alternatives is an introductory text relating physics principles to societal uses of energy inspired by the tumult insinuated by the looming energy crisis. Designed with the nonscience student in mind, the publication outlines the technologies and patterns of energy production and consumption from a physicist's perspective in a rather descriptive manner. The NEW seventh edition of : teaches physical principles and physical models filtered through the motif of energy-a conspicuous marker for the inner structure and dynamics of any society evaluates the technology and principles of energy converters and assesses the trade-offs involved in their societal deployment examines the consequences of working with finite energy resources emphasizes the effects, extent, and control of environmentally hazardous by-products of energy conversion processes sketches some of the most promising alternatives for sustainable energy generation and usage. features expanded and refined topical discussions in the light of recent developments, updated and expanded data and Web links, and incorporates new exercises and problems. To reinforce learning and comprehension, features Review Tasks and Questions , including questions highlighting the main topics and ideas in each chapter.