Worldchanging: A User's Guide for the 21st Century is a book about environmental concerns and practical actual responses.

It is a compendium of the solutions, ideas and inventions emerging today for building a sustainable, livable, prosperous future.

[1] In November 2006, Worldchanging published a survey of global innovation, with a foreword by Al Gore, design by Stefan Sagmeister and an introduction by Bruce Sterling.

It has received praise, was a winner of the 2007 "Green Prize" for sustainability literature,[2] and is being translated into French under the title Change Le Monde,[3] German and several other languages.

[5] The updated version was published April 1, 2011, called Worldchanging, Revised Edition: A User's Guide for the 21st Century ISBN 978-0-8109-9746-2.