Concerns for the disastrous consequences of Peak-Oil and Climate Change are the most obvious reasons for "Going Green". A great deal has been written about both subjects and it is not my desire to discuss the merits or lack thereof of either topic. You have probably "framed" your own position by now. I do posit the belief (based on the science I have seen) that the global production of sweet crude has peaked and that our species is responsible for major disruptions in the natural rhythms of the earth upon which we depend for survival.
In my last post I referenced Rob Hopkins (and I do so again). It would be well worth your time to listen to his interview if you have not. As an instructor and major advocate of permaculture he has great insight on how we need to approach the future collapse of America. The "Transition Initiative" is a methodology he and others have devised to help the communities of villages and hamlets in the U.K. understand the risks of complacency and move toward post-carbon solutions. They say that it is not merely going back to the past in terms of lifestyle but it has all the appearances.
This article appears in Apr 29 – May 5, 2009.