Environmental Life Cycle Assessment is an introductory college level textbook on the science of Life Cycle Assessment. It provides materials for a full year of study. Over thirty LCA experts were brought together by the American Center for Life Cycle Assessment, with full redundant editing to provide a consistent and comprehensive coverage of this broad field of study. Exercises are provide for each topic, covering everything from the nuts and bolts of the science to issues such as ethics and communication. Students using this textbook need only practical experience (as can be provided in lab courses) to be able to sit the exam for Life Cycle Assessment Certified Professionals.