Pandas and rain forests are never mentioned when it comes to the millions of people taking joyrides in their Range Rovers. Rather, it's the little things we're strong-armed into conserving. At a chain coffee bar in San Francisco, I saw a sign near the cream counter that read NAPKINS COME FROM TREES - CONSERVE! In case you missed the first sign, there was a second one two feet away, reading YOU WASTE NAPKINS - YOU WASTE TREES!!! The cups, of course, are also made of paper, yet there's no mention of the mighty redwood when you order your four-dollar coffee. The guilt applies only to those things that are being given away for free.