How green is your eReader/Kindle/iPad (not that anyone has one yet)? Common sense suggests that digital-anything is greener than the analog device it's replacing. "Which is Greener: Paper or Digital? The Answer May Surprise You" gives a bit of pause, right up there with the finding that Google searches are, yup, not without environmental impact.
One quote from the article worth thinking about:
“Making a computer typically requires the mining and refining of dozens of minerals and metals including gold, silver, and palladium as well as extensive use of plastics and hydrocarbon solvents. To function, digital devices require a constant flow of electrons that predominately come from the combustion of coal, and at the end of their all-too-short useful lives electronics have become the single largest stream of toxic waste created by man. Until recently, there was little, if any, voluntary disclosure of the lifecycle ‘backstory’ of digital media.”