Daniella,
Thanks for your response to my blog post. I apologize for this long delay in communication as I've been traveling for the last few months. Papanek wrote another timeless book you might be interested in.
Here are the details: "The Green Imperative" http://www.amazon.com/Green-Imperative-Ecology-Ethics-Architecture/dp/0500278466
Hope you enjoy this one as well.
Best, Martin