Permaculture is a really interesting school of thought which has been growing in popularity. The appeal of this theory is found in its ability to be a total solution. While building a green home or having a garden are great, it is simply one part of the total solution. We need to incorporate all aspects of our lives and start looking everything as a system, not separate parts. I found this website that goes over the basics of Permaculture and gives lots of great information. Check it out here.