world changing, a user's guide to the 21st century is a really great reference book i purchased at reform school. it answers to a lot of the questions about the all the environmental issues facing us and ideas in how to approach them. i am reading about consumption, why china wins, healing polluted land, building a green home and even about the hidden vitality of slums. i like that these are specific examples. hard to see from the photo, but it's as big as a textbook or large bible. everyone should read this.