The field of  toxicology has grown enormously since the first edition, then named Industrial Toxicology, was published in 1985. And while the original edition was largely popular among health professionals, the second edition, which published in 2000,  expanded it coverage to include environmental issues, and its name was changed to The Principles of Toxicology: Environmental and Industrial Applications   Since the publication of the second edition the field of toxicology and continued changing expanding.The new edition of this book continues to present compactly and efficiently the scientific basis to toxicology as it applies to the workplace and the environment. The book covers the diverse chemical hazards encountered in the modern work and natural environment, and provides a practical understanding of these hazards for those concerned with protecting the health of humans and ecosystems.