This book has been written for the students of graduate and post graduate classes of the Indian Universities. All aspects of the subject have been given due consideration interaction between man and his environment and has been discussed to a depth which is easily comprehensible and which as far as possible presents a correct perspective for undergraduate. The text has been effectively illustrated with an adequate number of maps and diagram. Statistics given in this book can be relied upon as they have been taken mostly from the publication of the control and state government.