Life is too short to obsess over your carbon footprint. If you love to fiddle with your computer and other energy-using gadgets you may love this book. As for me, I try to be a nice green citizen without expending too much personal energy on it.
I gave up on the extreme greenie stuff when I discovered that Energy Star hasn't updated its zip code file for a decade or more (what else is out on date on this website?) and that no one ever mentions the down side of CFL bulbs (after a fairly short time they dim down so much that you throw them out in disgust, so they don't last any longer that the old bulbs, they just cost a lot more and look uglier).
Wait -- maybe hanging out your wet clothes in Phoenix in the summertime does qualify as extreme greenie. The secret is to wait till after ten p.m. when the temp may have dropped below 100 F.