A new Chapter 21, “Global Warming: Real-time Change in the Earth System” focuses on why and how we study climate change. A new Pathway to Learning feature opens each chapter with a visual guide to the questions students will ask in order to achieve the set learning outcomes of the chapter. Student animation tutorials and Extension Modules are now offered on the Companion Website and embedded within an myeBook so students may easily navigate activities. One of several new Extension Modules, “The Future of Oil,” enables students to investigate this natural resource. A handsomely revised art program and overall design, as well as updated and revised content throughout, incorporate user feedback and create a welcome revision.