Different layers of gases in combination constitute atmosphere, these layers become thinner with the increase in height. Atmospheric science is a wider term used for studying earth's atmosphere, chemical reactions in stratosphere, gaseous exchange with the biosphere, lifecycle of aerosols, regional and global air pollution, and fluctuations in atmospheric composition. This book discusses some important topics such as air pollution, gas dispersion in atmosphere, seasonal variations, atmospheric chemistry, atmospheric physics, air quality, climate interactions, meteorology, etc. This book includes some of the vital pieces of work being conducted across the world, on various topics related to this field. It will provide comprehensive knowledge to the readers. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail. It is a beneficial read for climatologists, meteorologists, planetologists, professionals and students.