The book Environmental Studies is designed for the students of B. E. /B. Tech. in all disciplines as per new syllabus of JNTU, Hyderabad. Environmental Studies pertain to a systematic analysis of the natural and man-made world encompassing various scientific, economic, social and ethical aspects. In this book the fundamental environmental concepts have been introduced and analysed in a simple manner strictly as per the module syllabus designed by JNTU, Hyderabad. Besides undergraduate students, the book will also be useful for those appearing in various competitive exams since environmental issues now find a focus in most of such examinations. The contents of the book will be of interest to all educationists, planners and policy makers. Key features of the book include a simple and holistic approach with illustrations, tables and specific case studies in the Indian context in general and Andhra Pradesh in particular. The basic terminologies have been defined in the text while introducing the topic and some useful terms mentioned in the text have been explained in the glossary for an easy grasp by students of all disciplines.