I just spent two nights at the lovely, high-end Westin hotel in Ft. Lauderdale, FL. Around my room I found the now-standard signs that describe how the hotel will save water and energy by not changing sheets and towels. These green messages say to customers figuratively, and often literally, “we care about the environment.” So far so good. But when I first entered my room, every lamp and light in the place was on…plus two radios.