'Dr Carroll has written a practical, objective, informed and entertaining book that does a refreshing job of looking at energy from multiple angles. Students and activists alike would benefit from considering what Alan has to say.' Scott W. Tinker, State Geologist of Texas and producer of the global energy documentary, Switch 'Geofuels is an adventure into Earth's energy resources and ... Read morethe environment. It is hard to imagine a more interesting and readable book. Professor Carroll demonstrates his talent as a gifted teacher, using analogies, story-telling, and both historical and modern examples to make natural processes and facts intuitive and relevant. Anyone who reads this book, whether new to Earth science or not, is going to learn a lot about Earth systems, the nature and benefits of different energy sources, technology, environmental impacts, weather, oceans, soils, water resources and geology.' Steven Gorelick, Stanford University, California 'This is an excellent book, lively written, and full of insights. Dr Carroll's thorough knowledge of geology shines throughout the text, and makes this book interesting not only to a wide audience, but also to the scientists, who worked in some or most of the aspects of global energy supply. I happen to have worked and published in most of these aspects, and not only greatly enjoyed the book, but also learned several new things. Dr Carroll has set a very difficult goal for his book: to be easily readable by a broad lay audience, yet maintain the level of rigor that makes it also attractive to scientists and engineers. I congratulate him on achieving this goal admirably. I will strongly recommend this book to my family and friends.' Tadeusz Patzek, King Abdullah University of Science and Technology, Saudi Arabia Show Less