Originally published in 1980, this book is an original approach to the study of the atmosphere at A Level and introductory undergraduate courses. A true understanding of the way the atmosphere works is only attainable on a firm basis of science and the book concentrates on this aspect in a clear and straightforward manner without introducing advanced mathematics. The book discusses the atmosphere in terms of a machine fuelled by the Sun and it deals with the energy involved in global circulations before looking at local processes and finally global patterns. With a clear recognition of the vulnerability of climate to our wellbeing on a global scale, this book remains as relevant now as when it was first published.