Written for anyone who works with chemicals or has a general interest in ecology, this book examines the interrelationship of life forms in our environment and provides straightforward explanations about the complicated interactions among nature and humans. Emphasizing basic concepts, definitions, and descriptions, the author presents illustrative problems in terms of commonly used ecological parameters to provide readers with enough information to make technical and personal decisions about ecology. Funneling the broad, multidisciplinary field of ecology, which incorporates aspects of biology, chemistry, physics, geology, meteorology, agriculture, forestry, and more into a single stream, the author provides those with backgrounds in only a handful, or even none, of these disciplines with an easy-to-read understanding of the functions and values of ecology and its interrelationships with other sciences, including ecology's direct impact on our lives. Organized into three parts, this book examines the fundamentals of ecology, the role of biodiversity, and the practical side of ecology. Readers will examine such topics as biogeochemical cycles, ecological pyramids, and the laws of population ecology. They will also examine species, terrestrial ecosystems, and aquatic systems. Each chapter ends with a Chapter Review Test.