This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book highlights the effects of hazardous foods on mankind and the problems caused by hazardous exported pesticides on the innocent populations of developing countries, including the least developed countries. It focuses on the evolving law on the management of hazardous substances at the international level. The book briefly describes the law governing hazardous substances at the regional level. It is devoted to the study of national mechanisms for the management of hazardous substances and extensively explains the law governing this subject in India. The book outlines a discussion on the principle of liability in hazardous substance litigation. It identifies the loopholes in the existing laws governing hazardous substances.