This book presents an authoritive explanation and discussions of wide range of problems, in three sections, related to the environment, at a level suitable for the students and practitioners of science, engineering, administration and planning. This book will be of particular importance for the increasing number of teachers and students involved in the degree and diploma courses in environmental science. This book begins with a section on Bioremediation which provides a clear understanding how microbes, following their degradative processes, contribute maximally to the benefit of mankind through biotransformations of waste materials. The second section on biocontrol discusses the meeting of the major exponents in the scientific community working with enhancing different biological control agents (Fungi, Bacteria, Virus) on different targets (Pathogens, Insects, Weeds). The final section introduces the reader with emerging technologies like Microorganisms as indicators of pollution, Chemotaxis and its role in combating pollution, Microbial activity under electric fields for bioremediation and the most advanced technique of Biogranulation.