A friend of mine (hi David!) drives a Porsche. He tried to convince me recently that it was an environmentally friendly car. His arguments centred around technical stuff that I couldn't quite follow - opposing cylinders or something. A few weeks later, I read an argument that a Jeep Cherokee is the most environmentally friendly car, because it goes on for about thirty years.
Now, while researching stuff about cradle to cradle (read the book: it's by William McDonough and Michael Braungart), I stumbled across this transcript of a speech by designer Ben Terrett of The Design Conspiracy. He bangs on about pointless packaging, silly promotional activities, aeroplane design and holds Porsche up as an environmentally friendly car. Why? Because sixty percent of all the Porsches ever made are still on the road.
He then muses on the impact on the environment if that sixty percent applied to other things. Computers for example. It's a great read. (A couple of rude words, but that's how it is these days.)