The Ooligan Way
Ooligan Press is a teaching press staffed by students at Portland State University. They participate in an apprenticeship program under the guidance of a core faculty of publishing professionals.
As part of their education, they learn about sustainable publishing practices. They put that knowledge to good use by producing, Rethinking Paper and Ink: The Sustainable Publishing Revolution. This was the first book in their Open Book Series. All of the books in the series will have an environmental audit showing the choices they made toward sustainable publishing.
The entire book is available for free as a pdf download on their site. I urge you to read it and pass it along to your colleagues in the publishing profession.