Worldchanging : a user's guide for the 21st century / edited by Alex Steffen ; foreword by Al Gore ; design by Sagmeister Inc. World changing Steffen, Alex. Environmentalism. Sustainable development. Green movement. HC79.E5 W676 2006 333.7 22 WOR Includes bibliographical references (p. 538-546) and index. New York : Abrams, 2006. 2006. 2006 Text 596 p. : http://www.loc.gov/catdir/toc/ecip0616/2006021673.html eng