Amazon.com description: Product Description: Bring your learning to life with compelling images, media and text from National Geographic. NATIONAL GEOGRAPHIC LEARNING READER: SUSTAINABILITY w/PAC eBOOK will help you develop a clearer understanding of the world around you through engaging content. This reader is designed to be used in combination with several core texts in a variety of trades fields by focusing on the importance of Green and Sustainability. Used as a supplement with two strong brands of National Geographic and Delmar Learning, this reader will bring relevancy, critical thinking skill activities, vocabulary and career information to the topics you are studying. With broad articles included in the reader, the companion website will allow you to apply topics as they show how the theories are applied in a real world setting.