Environmental engineering is a multi-disciplinary branch of engineering and is an essential component of sustainable development as well as resource management. It combines subjects from diverse branches of engineering and environmental science. The aim of this book is to educate the reader about various theories and practical applications of environmental engineering, such as environmental preservation, control and effective management of waste from human and animal activities, waste water management, etc. It strives to provide a better understanding of the interactions between human beings and their environment. This book is highly recommended for the students of various branches of engineering and those pursuing environmental sciences.