Back in 2001 when I sold my company I bought a Chevy Tahoe and paid cash. I'm a lot more environmentally sensitive these days and wouldn't buy a new Tahoe. So I've been thinking about trading it in and getting something more rational. Having said that I also think that in order to truly cap problems the solution is not buying more new cars but rather keeping the cars we have on the road longer and therefore minimizing all of the energy that goes into producing new vehicles. This article and associated comments had a lot to do with my thinking:
Look beyond gas mileage when making an environmental choice - (37signals)
So I'm curious. As an environmentally sensitive person does it make sense to go out and buy a different car or just keep what I have?