Well, maybe we should all kick you in the balls for the size of your carbon footprint.
Consider the eco-conscious automobile par excellence, the Toyota Prius. As it turns out, manufacturing the Prius's battery is extraordinarily carbon-intensive. Paying off this carbon debt through fuel savings will take 46,000 miles, according to Wired. Only after 100,000 miles would the Prius catch up with carbon savings offered by a ten-year-old Toyota Tercel. And the Prius would never catch up with a 1994 Geo Metro XFi.
By now the Prius is a cliche. Tooling around in an ancient, airbag-less deathtrap, by far the greener choice, is not. So one hopes the celebrity avant-garde will start bidding up the price of aging Tercels and Geos and Chevrolet Sprints, tricking them out and inspiring America's Joneses to keep up. Soon we'd see almost-new automobiles sporting faux rust, the better to convince us of their owners' environmental virtue. But somehow I doubt that Planet Green and the world's leading automobile manufacturers will push this line too hard. After all, used car dealers generally don't have big advertising budgets.