Today man has made remarkable progress in various fields of science and technology. The very outcome of this progress which clearly reflects in the ‘development’ and ‘advancement’ has direct bearings on our natural environment. The rate, at which industrialization, urbanization and infrastructure development is taking place, no doubt, indicates a spurt in development but definitely not without environmental degradation. The pollutants and toxicants released by aforesaid sectors are having hazardous effects on our bio-resources. Moreover, the impact of environmental pollution is no longer confined to local or regional boundaries; rather it extends to the global environment. In fact, today we can drink, breathe, smell and see pollution. Within the past forty years or so, man has brought the earth to the brink of ecological disasters by generating innumerable industrial and agro chemicals. Most of these chemicals when inhaled, swallowed or administered in animal body, produce deleterious effects. In the present book, we have tried to reflect ongoing researches in our country pertaining to the eco-toxicological effects and management of various toxic substances, viz., crop protection chemicals, metallic toxicants, industrial effluents, fertilizers, pesticides and even venom in different biological models. We hope that one will find this volume useful for garnering an insight into the various dimensions of the environment-people interference and establishing a framework for action at one’s own level as an informed citizen. The present book entitled, “Environmental Toxicology”, has been painted on a large canvas with broad strokes comprising 21 chapters by experts and researchers delved in their respective fields covering the subject area.