In this course book a broad concept of environment and nature is given, which is used by the UG and PG students. This book contains 15 chapter and 52 tables of environmental aspects, which is valuable for UG and PG students of environment, life science and natural sciences.According to the decision of Honorable Supreme Court, the University Grant Commission has decided, that the student of bachelor degree of any course or stream have to qualify a paper of environment for the knowledge of basic concept of environment and its conservation. Therefore in India the paper of environment is running in every university or institution with name of Environment Sciences or Environmental Study.It is the hope that this book will help to students and people from every walk of life to understand the basic concept of environment and nature, and to ensure the sustainability of life support system on this planet earth.