Mine areas left behind by companies that no longer exist are defined as derelict mines- those that were operated and closed at a time when most countries did not have adequate regulations requiring rehabilitation of the impacted mine areas. This new book provides unique information on the extent and severity of derelict mines' impact on environmental degradation and human and environmental health. It examines the nature of derelict mines, short- and long-term risks to sensitive receptors, tools for monitoring and prioritizing risks, and technological advances for rehabilitation. This book considers a risk-based approach to managing derelict mines, which is both reliable and cost effective.