Al Gore can present as many scary facts and figures about global warming as he wants, but until we have practical methods for change, no change will happen. That’s where Mathis Wackernagel, Phil Testemale, William E. Rees' book Our Ecological Footprint: Reducing Human Impact on the Earth comes in.
The authors start by defining the oft-thrown around concepts of “sustainability” and “ecological footprint.” They then turn to talking about how modern environmental practices are not sustainable in the long term. They move into a discussion of how we can measure our footprint—if we don’t know it, how can we change it?—and finish by suggesting methods by which we can reduce this footprint.
The book is very dense and is probably a drier read than most people would want outside of a college textbook. But I don’t know of any light and fluffy books that give you the same kind of sustainable living techniques, so regardless of it’s depth, it’s certainly worth a read.