Synopsis Biodiversity is one of the major global resources. It has suffered from diverse natural and man-made catastrophes but continues to provide food, medicinal products and a wide range of other materials which could be guaranteed for the future if managed in a sustainable manner. Human influence is by far the greatest threat to diversity. No part of the planet escapes the effects of human activity, which affects diversity either directly or indirectly. This book will be highly beneficial to students, teachers and research workers in the field of botany, biodiversity conservation and environmental science.