'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 the 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 insight...