Deep underground, Earth is constantly generating heat energy. Sometimes this energy reaches the surface in the form of geysers, hot springs, volcanoes, and other geothermal features. It is also a tremendous resource for generating electricity. In this book, readers will discover the power inside our planet, from what causes it to how people are using it in new and exciting ways. Provided by publisher.

A need for alternative energy -- Earth's heat -- What is geothermal energy? -- From health spas to nightlights -- How do people use this geothermal activity -- The big truth -- Sharing the wealth -- Is it possible for Iceland to share its alternative resources? -- Tracking the heat -- How do researchers find geothermal reservoirs? -- A geothermal future.