One of the reasons I bought my Kindle was to cut down on my carbon footprint and my storage space, not to mention that fact that I thought I was saving trees and paper for future generations.
Not to rain on anyone's parade, but I just listened to an interview with a woman who works for a paper company. They provide the paper for many different businesses, including books. She made some points that I really took note of...
1 - paper companies (I think she means the mills - but I could be wrong) plant more trees than they cut down;
2 - paper is sustainable, and can be completely recycled;
3 - the manufacturing of the plastics that make up devices (e-readers, phones, etc.) are not environmentally sound (but then again, either are paper mills, although they are supposed to be up to gov't standards - who knows);
4 - the data storage centers (like Amazon) that maintain these digital files require massive amounts of cooling to keep the servers from getting too hot...
So, while we may all think we're doing the earth a favor by not buying paper books, I think it's a wash.
For anyone interested, she is interviewed on the latest episode of the Books on the Nightstand podcast.