I'll be up front an honest here, most of this "green movement" is bogus! There I said it. I don't want to be the way out wacko guy here, but take a minute and look at the people pushing the hardest for this agenda, they are looking to profit greatly either through investments they have in companies, or in gaining political power.
That said there are some good and common sense things that everyone can do to reduce needless waste. Ford has been doing something about this for a few years now with the "Living Roof" on the Rouge Truck plant. Mark and Joe from Re*Move (who I had beers with last night and I have to say are some really great people) put this video together on a trip to visit with Ford. Have a look.