Emergency responders from fire departments, other aid organizations, and the police are repeatedly confronted with CBRN (Chemical, Biological, Radiological, and Nuclear) hazards. This book provides a detailed explanation of potential threat scenarios posed by these dangers and comprehensively describes corresponding measures for hazard mitigation. Important information on the effects and identification of various hazardous substances, as well as on operational planning, decontamination, and training, complements the content.