Earth's atmosphere consists of different gases, namely nitrogen, oxygen, argon and carbon dioxide with water vapors. The study of air is called aerology. The various layers in Earth's atmosphere are thermosphere, stratosphere, exosphere, troposphere and mesosphere. This book is a valuable compilation of topics, ranging from the basic to the most complex theories and principles in the study of Earth's atmosphere. The topics included in it are of utmost significance and bound to provide incredible insights to readers. Coherent flow of topics, student-friendly language and extensive use of examples make this textbook an invaluable source of knowledge.