A unique introduction to the holistic view of the Earth. Stresses the systems approach, showing the energy flows and links between the Earth's different parts—the atmosphere, hydrosphere, biosphere and the solid Earth—and the balance in the global environment that exists as a result of these interactions. Every chapter opens with a topical essay dealing with research on the subject matter and closes with a guest essay written by a researcher in the field. Special attention has been paid to select full-color artwork and photographs which illuminate discussions.