PakCat catalogue record Worldchanging a user's guide for the 21st century By edited by Alex Steffen ; foreword by Al Gore ; design by Sagmeister Inc Bibliographic details ISBN0810930951 PublisherAbrams Publication placeNew York Publication year2006 LanguageEnglish Material typeBook Physical description596 p. Additional authorsSteffen, Alex. SubjectsEnvironmentalism., Sustainable development., Green movement.