The many thousands of human-made and other chemical compounds present in the environment offer a serious challenge to our btosphere. It is appropriate, therefore, that our response to these products of human kno- edge and ingenuity should draw on a body of mtenstve scientific endeavor that is no less impressive. Bioremediation offers the possibility of harnessing the diversity of the biosphere to degrade, remove, alter, or otherwise detoxify these various chemicals. It brings together scientists from a wide variety of disciplines and backgrounds, such as microbiology, molecular biology, a- lytical chemistry, and chemical and environmental engineering, among o- ers. These different fields, each with its own individual approach, have actively contributed to the development of bioremediation research tn recent years. The prmcipal objective of Bioremediation Protocols is to make the fruits of some of this research available in a different format to that of the textbook or journal article. It provides a selection of clearly written laboratory pro- cols presented as stepwise, easy-to-follow mstructions. In common with p- wous volumes in this and the companion Methods in Molecular Biology series, an extensive ¿Notes¿ section is provided with each chapter. This contains u- ful mformation (of a type often not normally included m a research paper) supplementmg the protocol. Reviews and case studies are also included to provide a deeper context to the methods chapters.