Paper or plastic bags? Cloth or disposable diapers? Aluminum cans or glass bottles? If you want to go green but are baffled by such environmental quagmires, take heart: The eco-experts behind the green news and humor Web site Grist.org get to the bottom of these and other puzzles of the universe in their new book, Wake Up and Smell the Planet.
Read on, and watch the layer of fog start to lift away.