Nano and Tesla's Roadster, and there's no word yet on what might go under the hood -- presumably a smallish electric engine... or a stardust-powered unicorn, perhaps. That funky-looking body should last the average length of ownership; after five years (or even longer, depending on the composition), it can be replaced or naturally returned to the Ma Earth. One potential downside of biodegradable vehicles? No more "dead car" Flickr albums. Also, no warranties.