Environment, Ninth Edition weaves the central themes of Systems and Sustainability throughout the text to help students understand the connection between the core concepts of Environmental Science and their daily lives. The 9th edition features a rich collection of current case studies and in-text examples, highlighting local and regional issues which provide students with the science and tools to understand, apply, and think critically about environmental science. It also provides instructors a powerful tools to assess individual students progresses well as the class as a whole. Peter Hamilton Raven FMLS is an American botanist and environmentalist, notable as the longtime director, now President Emeritus, of the Missouri Botanical Garden. David M. Hassenzahl is the author of Environment , 9th Edition, published by Wiley. Mary Catherine Hager is the author of Environment , 9th Edition, published by Wiley. Nancy Y. Gift is the author of Environment , 9th Edition, published by Wiley. Linda R. Berg is the author of Environment , 9th Edition, published by Wiley.