Synopsis This book deals with the applied microbiology of pollution and its control in connection with public health and hygiene. Each chapter includes a self contained review, fully updated and substantially enlarged with regard to the first edition, including a large number of recent references to primary sources of information. The book covers a wide range of subjects and includes practical aspects such as sewage treatment, and also aspects which at the present moment are mainly theoretical, for example the genetic aspects of biodegradation of pesticides. In this work the emphasis lies on the microbiological aspects of the problems and possible solutions. The book will be invalauable help to students, researchers and all those interested in the field of microbiology and environment.