This page intentionally left blank Copyright © 2009, New Age International (P) Ltd., Publishers Published by New Age International (P) Ltd., Publishers All rights reserved. No part of this ebook may be reproduced in any form, by photostat, microfilm, xerography, or any other means, or incorporated into any information retrieval system, electronic or mechanical, without the written permission of the publisher. All inquiries should be emailed to [email protected] ISBN (13) : 978-81-224-2714-1 PUBLISHING FOR ONE WORLD NEW AGE INTERNATIONAL (P) LIMITED, PUBLISHERS 4835/24, Ansari Road, Daryaganj, New Delhi - 110002 Visit us at www.newagepublishers.com Preface The Hon’ble Supreme Court of India passed an order in 1991 for the introduction of a common course on Environment in colleges and universities at undergraduate levels for all disciplines. But the order was not properly implemented. Displeased with non-compliance of this order, the Supreme Court again ordered in 2003 for the introduction of Environment as a compulsory subject at higher secondary level in schools and undergraduate levels in colleges, and even issued warning of legal action, if necessary. The introduction of the common course on environment and ecology under compulsion obviously brought confusion in the academic communities due to the lack of suitable textbooks in the subject and lack of orientation about the subject among the teachers and students of various disciplines. The authors, with their long experience in environmental teaching and research, took up the challenge and brought out a standard textbook. The book is written as per UPTU syllabus and the various units associated with it have been presented in a simple and lucid style to suit the requirements of the course. Glossary of key terms is given at the end for easy understanding of the subject while feedback exercises are intended to reinforce the knowledge of the students. Contents Preface V UNIT–I A. Environment 1 1.1 Definition 1 1.2 Ecology 2 1.2.1 Biomes 3 1.3 Scope 4 1.4 Importance of Environment 7 1.5 Need for Public Awareness 8 1.6 Ecosystems 9 1.7 Sustainable Ecosystem 10 1.8 Human Activities and Environment 11 B. Human Activities and their Impact on Environment 12 1.9 Agriculture 12 1.10 Industry 16 1.11 Transport 16 1.12 Mining 17 1.13 Environmental Impact Assessment (EIA) 19 1.14 Sustainable Development 19