I am a huge fan of the Lotus Elise and especially the new Tesla Roadster (because they are practically kissing cousins) but I found some middle ground.
The Lotus Eco Elise.
To achieve the "Eco" status they use sustainable alternatives for different materials and add a water based paint. Oh, and there are solar panels in the hard top that supplies power to the electrical system.
I really like these shoes! I have a pair of the Simple Green Toe and I really love them but these have recycled car tires and bike tires on them! I especially love the car tire bottom. It's got to be pretty cool!