This new edition of Consider a Spherical Cow teaches basic mathematical modeling skills that are widely applicable to a huge range of environmental problems facing the world today. Organized both by modeling tools and environmental topics, this innovative book includes 56 posed problems and worked-out solutions. Readers will find introductions to topics, extensive pedagogic material explaining how to use the relevant modeling tools, and opportunities to think more deeply about or confirm steps in the provided solutions. This new edition includes 101 new quantitative homework exercises, an appendix compendium of updated environmental data, a glossary, and a bibliography, plus entirely new sections on probability, toxics, radiation and radioactivity, and epidemics.With wide topical coverage, Harte teaches the math step by step in the context of actual posed environmental problems, emphasizes limitations and strengths of models, and describes practical applications to real problems and situations. Along with the many worked-out problems, discussion questions and quantitative problems are provided as exercises for the reader. The book emphasizes creative applications of math to environmental science, not plug-in problems.