The book entitled ÒPrinciples of Environmental BiologyÓ reveals about recent studies in ecology, environment, and related social issues. Considering the importance of environmental research the book covers various aspects like speedily recurring floods and droughts; grave pollution of air, water, and land; ever shrinking of natural landscapes; fastly vanishing wild life and depleting natural resources; human population explosion etc. All these problems have cropped up only due to thoughtless exploitation of various natural resources by man and also due to his absolutely egoist attitude towards the nature. This book provides a comprehensive set of research articles in environment, ecology, and biodiversity, which will be useful for research scholars and scientists studying biodiversity. Students and scientists can gather useful information for their studies and that once they have grasped, will help open new vistas in the field of environment.