In this lab investigation, students apply the disciplinary core ideas of (a) Natural Resources and (b) Human Impacts on Earth Systems as they develop a plan to ensure that there is enough water available to meet the current and near-future needs of the people living in the Phoenix metropolitan area. Included are the Teacher Notes, Lab Handout, and Checkout Questions for the lab, in addition to the book’s Table of Contents, Preface, About the Authors, Introduction, and Index.