of Pearson's MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable. In addition, you may need a CourseID, provided by your instructor, to register for and use Pearson's MyLab & Mastering products.   Packages Access codes for Pearson's MyLab & Mastering products may not be included when purchasing or renting from companies other than Pearson; check with the seller before completing your purchase.   Used or rental books If you rent or purchase a used book with an access code, the access code may have been redeemed previously and you may have to purchase a new access code.   Access codes Access codes that are purchased from sellers other than Pearson carry a higher risk of being either the wrong ISBN or a previously redeemed code. Check with the seller prior to purchase.   -- Essential Environment: The Science behind the Stories, Fourth Edition engages students with integrated central case studies that provide students with a tangible framework for understanding science in a brief 18-chapter text. Jay Withgott and new co-author Matt Laposata present the latest coverage of environmental science and introduce new FAQ sections to address common student misconceptions. With over 50 new MasteringEnvironmentalScience™ activities written by the authors, your students will arrive better prepared for class.   0321752546 / 9780321752543 Essential Environment: The Science behind the Stories with MasteringEnvironmentalScience Package consists of:    0321752902 / 9780321752901 Essential Environment: The Science behind the Stories 0321754077 / 9780321754073 MasteringEnvironmentalScience with Pearson eText -- Access Card -- Essential Environment: The Science behind the Stories  

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