Horse Manure: The Gift That Keeps on Giving

A story told on pp. 8-11 of SuperFreakonomics – about the plague of horse manure, the introduction of the automobile (an “environmental savior”), and the resulting carbon emissions — has been turned into (of all things) a Mercedes-Benz commercial. (No, we weren’t compensated … yet.) It is interesting that Mercedes calls its anti-emissions initiative “BlueEFFICIENCY” rather than “Green.” Has “green” worn out its welcome? (HT: Matthijs Kooiman)