Terms such as "global warming," "greenhouse effect," and "ozone layer" tend to have soporific associations: more lullaby than wake-up call (think Al Gore). You know these are important issues; you know you should care. Or perhaps you do care—but enough to change the way you live? Maybe you don't know where to start. Read this book and you will.

Ozone is a major component of air pollution. It’s caused by a reaction between nitrogen oxides and volatile organic compounds that are emitted by power plants, factories and