Book excerpt: Biological and Environmental Hazards, Risks, and Disasters are critical areas of study that encompass a wide range of threats to both the natural world and human populations. This multidisciplinary field explores the interactions between living organisms and the environment, as well as the potential consequences of these interactions. "Biological And Environmental Hazards, Risks, And Disasters: Key Areas for Study" is a comprehensive book that gives information about Environmental Hazards, Biological Hazards, and Its effect on Environment. This book also highlights Loss of biodiversity, its chronic effect on health. Additionally, the book also describes desertification and ecological impact of climate change. Moreover, this book will be equally useful to readers from a variety of backgrounds, including researchers, teachers, students, and biological scientists.