The Dilbert creator's Saturday Essay in the WSJ this weekend was great. He explores how difficult it is to truly build a green home (through his own personal experience). One of my favorite lines:
The greenest home is the one you don't build. If you really want to save the Earth, move in with another family and share a house that's already built. Better yet, live in the forest and eat whatever the squirrels don't want. Don't brag to me about riding your bicycle to work; a lot of energy went into building that bicycle. Stop being a hypocrite like me. [emphasis mine]
And later:
Photovoltaic systems are a waste of money. But I'd do it again in a heartbeat, because I love the Earth, damn it. In my defense, the price of your future photovoltaic system will never come down unless idiots like me pay too much today. You're welcome.