Book excerpt: This book is designed for first- and second-year universitystudents (and their instructors) in earth science, environmentalscience, and physical geography degree programmes worldwide. Thesummaries at the end of each section constitute essential readingfor policy makers and planners. It provides a simple but masterlyaccount, with a minimum of equations, of how the Earth’sclimate system works, of the physical processes that have givenrise to the long sequence of glacial and interglacial periods ofthe Quaternary, and that will continue to cause the climate toevolve. Its straightforward and elegant description, with anabundance of well chosen illustrations, focuses on different timescales, and includes the most recent research in climate science bythe United Nations Intergovernmental Panel on Climate Change(IPCC). It shows how it is human behaviour that will determinewhether or not the present century is a turning point to a newclimate, unprecedented on Earth in the last several millionyears.